TExES Exam 291 Science

he feature of the night sky known as the Milky Way is best described as- A. A concentration of the stars of our own galaxy, which are closer to earth than the stars of other galaxies B. Comets and other interstellar objects that are distributed between our solar system and distant stars C. The band of astroids between earth and mars, which reflect light of the sun D. The plane in which the greatest number of galaxies were distributed in the universe after the Big Bang

A. A concentration of the stars of our own galaxy, which are closer to earth than the stars of other galaxies

Miss Laura is teaching a lesson to her fourth grade class about the motion of a pendulum. She tied a string to one end of a yellow highlighter, held the other end of the string fixed, pulled the highlighter back on a small angle, and released it. The object went back-and-forth. She did this several times while asking the class about the differences in the pendulum before it was released and after it was set in motion. At one point Mrs. Laura asked the class whether the object would move faster at the bottom point if the object was held at a greater height off the ground and released. It turned out this was true. her demonstration of the class is an example of- A. Conservation of energy B. Conservation of mass C. Kinetic energy D. Potential energy

A. Conservation of energy

Mr. Thompson students are studying heredity. He has asked his fifth graders to organize the labels shown below into the correct order. In which order would the students place the labels if they are organizeding the genetic information from the simplest to the most complex? A. DNA (one house on a street), genes (whole street of houses), and chromosomes (all streets in a neighborhood) B. Chromosomes, DNA, genes C. DNA, chromosome, genes D. Genes, DNA, chromosomes

A. DNA (one house on a street), genes (whole street of houses), and chromosomes (all streets in a neighborhood)

Which of the following student activities will most effectively help students to think critically about the role of plants in an ecosystem? A. Designing a functioning terrarium that includes plants and animals B. Labeling a picture of the living and nonliving factors of an area that includes plants and animals C. Searching for articles about the life cycles of plants on the Internet D. Comparing pictures of plants in various biomes

A. Designing a functioning terrarium that includes plants and animals

One reason each plant loses a different amount of water is that each has - A. Different guard cells adapted to maintain homeostasis B. Different types of insulin-secreting cells that regulate water levels C. The same number of chloroplasts but different rates of photosynthesis D. The same rate of photosynthesis but different numbers of chloroplasts

A. Different guard cells adapted to maintain homeostasis

Mrs. Wade is teaching a lesson to her 4th-grade class on the period of a pendulum. She wants her students to perform a laboratory investigation to determine the effects of certain variables by asking them the following question: Does the mass of the object or the length of the string affect the period of the pendulum? She then has her class sorted in small groups, in which they construct their own pendulum and set out to design an experiment to answer this question. In order to minimize any possible inconsistencies in the data, Mrs. Wade might suggest which of the following to her students? A. Each group performs several measurements and takes the average B. All groups average their results together C. Every group performs the same experiment over the next two days and averages the values D. Each team member makes a measurement of the period, and the team averages the values

A. Each group performs several measurements and takes the average

Beach front property in coastal states such as Delaware, Maine, and Washington are all increasingly threatened by - A. Erosion B. Tectonic processes C. Hurricanes D. Deforestation

A. Erosion

Which of the following pieces of safety equipment are most important to have when conducting an investigation that uses glassware? A. Goggles B. Earplugs C. Fume hoods D. Fire extinguishers

A. Goggles

How do rubrics and spending time reviewing expectation foster success in the classroom? A. Having a no secrets class means that grades are not a secret. Reviewing expectations and sharing assignment requirements communicates evaluation criteria B. Rubrics allow teachers to list everything they want to see on a finished product of an assignment, which ensures all standards are covered for the unit C. Communicating success criteria in a rubric teaches students the vital details necessary to grasp the concepts of a standard within a unit of study D. After an assessment, teachers create a rubric fro re-teaching assignments. The rubric lets students know their weaknesses to focus on during the redo sessions.

A. Having a no secrets class means that grades are not a secret. Reviewing expectations and sharing assignment requirements communicates evaluation criteria

Of the following conditions, which are the best for forming dew on grass? A. High relative humidity, falling temperatures B. High relative humidity, rising temperatures C. Very low relative humidity, falling temperatures D. Very low relative humidity, rising temperatures

A. High relative humidity, falling temperatures

How is using a class competition and artful thinking a good method to fostering inquiry in a science classroom? A. Learning is social and wen students work together to generate questions and then evaluate the questions, they use engaging methods to refine and sort questions B. Artful thinking breaks the ice in a class discussion and encourages students to engage with one another C. Class competition creates engagement when students are having fun, they are more likely to learn D. Inquiry requires laughter and when students work together, they are most likely to have fun while they write questions during an artful thinking activity in science class

A. Learning is social and when students work together to generate questions and then evaluate the questions, they use engaging methods to refine and sort questions

When cleaning the cage of the turtle in the classroom, the teacher must ensure that students wash their hands when finished because of the risk of illness due to which of the following - A. Salmonella bacteria that live on the exterior of some reptiles B. E. coli. bacteria that can contaminate the eggs of some reptiles C. Various viruses that inhabit the crevices of the reptile exteriors D. Infection from a potential bite when handling and moving the turtle

A. Salmonella bacteria that live on the exterior of some reptiles

How does studying acid rain's impact on vegetation help scientists understand that a change in pH in a diabetic will harm them due to acidosis? A. Science is made of unifying concepts with similarities that can be used to infer B. Science is made of individual concepts that have to be studied independently C. Science categorizes information for understanding D. Science researches the mechanisms to natural phenomena

A. Science is made of unifying concepts with similarities that can be used to infer

Which THREE of the following are very different for the Sun and the Moon? A. Size B. Mass C. Shape D. Density

A. Size and B. Mass and D. Density

Movies often create misconceptions in science because they have details for entertainment that are not true. For example, when a spaceship explodes, there is sound. Why isn't there sound in space? A. Sound is caused by a disturbance that transfers energy through matter until it reaches an eardrum that changes the disturbance to a sound in the brain. Space does not have matter such as air and water to transmit the disturbance B. Sound is caused by the vibrations of matter. As matter moves, it creates a disturbance. In order for sound to be transmitted in space, more planets would need to orbit the sun in order to transfer the energy C. There isn't sound in space because humans cannot survive and be exposed to space in order to hear that sound D. There is not sound in space because the large planets and moons absorb the energy before it can be heard

A. Sound is caused by a disturbance that transfers energy through matter until it reaches an eardrum that changes the disturbance to a sound in the brain. Space does not have matter such as air and water to transmit the disturbance

Of the following, which best accounts for the phases of the Moon as seen from Earth? A. The motion of the Moon around Earth B. The orbit of an asteroid around the Moon C. The changing position of clouds in Earth's atmosphere D. The shadow of the Earth passing over the surface of the Moon

A. The motion of the Moon around Earth

A population of mice, with both dark- and light-colored individuals, lived in an area of light-colored sand. Development in the area has displaced the population to an area of dark-colored rock. Which of the following is most likely to occur to the displaced population in the new environment? A. The proportion of light-colored mice will decrease to increased predation B. The proportion of light-colored mice will increase due to decreased competition C. The proportion of dark-colored mice will decrease due to increased ground temperature D. There will be not change in the proportions of dark- and light-colored mice, since color is genetically determined

A. The proportion of light-colored mice will decrease to increased predation

Which of the following statements correctly compares the mass of a puddle of water to that of the water vapor after the puddle evaporates? A. The puddle of water has a mass equal to that of the water vapor since the water has only changed phases B. The puddle of water has greater mass than the water vapor since the puddle remains close to the surface of the Earth C. The puddle of water has greater mass than the water vapor since the puddle is a liquid and the vapor is a gas D. The puddle of water has a mass equal to that of the water vapor because the puddle of vapor take up the same amount of space

A. The puddle of water has a mass equal to that of the water vapor since the water has only changed phases

A teacher assigns her middle school students to read about types of rocks. Which of these follow-up activities might provide the most relevant way for her students to learn about types of rocks and their characteristics? A. The teacher will provide embossed graphics that capture the characteristics of different rock types B. The teacher will provide a printout table neatly listing rock types, rock descriptions, and other characteristics along with pictures C. The teacher will provide high resolution pictures of rocks fro students to examine and identify rock types and characteristics D. The teacher will provide a touch screen eboard that allows for movable images of rocks on the screen with access t other related links for topic support

A. The teacher will provide embossed graphics that capture the characteristics of different rock types

In a science experiment, 10 mL of Solution A are added to a test tube containing 10 mL of Solution B. The test tube is immediately sealed with a rubber stopper. The two solutions are both clear and colorless. As the solution mix, the test tube becomes warm and the contents become cloudy. Finally, as the test tube is left undisturbed for several minutes, a white solid settles to the bottom of the test tube covered by a layer of clear, colorless liquid. Which of the following is a correct conclusion about this chemical system from the beginning to the end of the experiment? A. The total mass of the system remains unchanged B. The identities of the chemicals in the system remain unchanged C. The total energy of the system remains unchanged D. The densities of the materials in the system remain unchanged

A. The total mass of the system remains unchanged

Why do clouds and precipitation usually occur along the frontal surface? A. The warm air rises, expands, and cools B. The warm air sinks, expands, and warms C. The cool air rises, compresses, and cools D. The cool air sinks, conferences, and warms

A. The warm air rises, expands, and cools

Ms. Meadors took her sixth grade students outside during a particularly windy day one March afternoon. She then asked her students why the wind tended to blow harder in March then it did other months of the year. Which of the following is the correct response to this question? A. There is a greater differential in temperature of air masses on the earth during this time of year B. The air masses tend to have about the same temperature throughout the earth during this time of year because the weather is not hot or cold C. The air around the equator heats up and moves toward the poles this time of year D. There is more water vapor in the arid regions of the country this time of year causing the wind to blow harder

A. There is a greater differential in temperature of air masses on the earth during this time of year

Which of the following substances can occur naturally on Earth in the solid state? A. Water B. Oxygen C. Nitrogen D. Helium

A. Water

Which of the following will best represent data showing the average monthly rainfall amounts for two cities over the course of a year? A. A pie chart B. A bar graph C. A photograph D. A Venn diagram

B. A bar graph

Ms. Simmons' sixth-grade students are conducting an investigation to determine of meal worms are more active during the morning or afternoon. Student groups are observing and recording the activity levels of the meal worms twice during the morning and twice during afternoon time periods. At the end of a two-week period of time, the students will form their conclusion. What type of scientific investigation is described in this scenario? A. A controlled experiment B. A descriptive study C. An intervention study D. A casual comparison

B. A descriptive study

Students in Mr. Neeve's 5th grade classroom are preparing a presentation highlighting their garden projects. They want to show data which illustrates the growth of two sunflowers over a three month period of time. Which of the following is the MOST appropriate way fro presenting the growth of plants over time? A. A bar graph B. A line graph C. A pie graph D. A chart showing all of the measurements for a three month period of time

B. A line graph

A decrease in the population of a producer will have the most direct immediate effect on which of the following types of organisms in a food chain? A. An apex predator B. A primary consumer C. A secondary consumer D. A tertiary consumer

B. A primary consumer

Which of the following is the most important function of stomata, the small openings found primarily n the surfaces of plant leaves? A. Allowing pollinators to access the reproductive parts of the plant B. Allowing gases to be exchanged between the plant and the atmosphere C. Allowing water to be absorbed from the surface of the leaves D. Allowing sunlight to enter the cells of the leaves

B. Allowing gases to be exchanged between the plant and the atmosphere

The earths moon is- A. Always much closer to the sun than it is to the earth B. Always much closer to the earth than it is the sun C. About the same distance from the sun as it is from the earth D. Sometimes closer to the sun than it is to earth and sometimes closer to earth than it is the sun

B. Always much closer to the earth than it is the sun

In a study on the climbing ability of lizards in a particular habitat, it was found that members of a lizard species with longer legs were better able to climb and survive than members of a lizard specie with shorter legs. In this instance, the longer legs are best considered which of the following? A. A mutation B. An adaptation C. A recessive trait D. A learned characteristic

B. An adaptation

The deforestation of land along a river will most likely result in: A. A decrease in the amount of runoff into the river B. An increase in the rate of soil erosion into the river C. A decrease in the amount of sunlight that reaches the river D. An increase in the number of animals that make their homes along the river

B. An increase in the rate of soil erosion into the river

Which of the following types of energy is stored in a battery? A. Mechanical B. Chemical C. Light D. Heat

B. Chemical

Students in Mr. Lerners sixth grade class are beginning a unit on meteorology. He notices from listening to the small group discussions the students seem confused about the difference between weather and climate. Which of the following statements is not true about the difference? A. Weather includes temperature, precipitation, humidity, wind speed over short periods of time B. Climate include changes in temperature, humidity, wind speed, rainfall in a large area of the earth of a short periods of time C. Climate refers to the averages in rainfall, humidity, temperature, etc. of an area over fairly long periods of time D. Weather changes quickly from one day to the next while climate is indicative of average conditions over long periods of time

B. Climate include changes in temperature, humidity, wind speed, rainfall in a large area of the earth of a short periods of time

If the forces acting upon an object are balanced then the object - A. Could not be moving B. Could be moving with a constant velocity C. Could not be accelerating D. Could be moving with a constant force

B. Could be moving with a constant velocity

A part of a de-starched leaf of a potted plant was covered with black paper strips on both sides and the plant was kept in sunlight for 8 hours. The leaf was then tested with iodine after boiling it in alcohol. Only the uncovered part of the leaf turned blue black. The inference is that - A. CO2 is necessary for photosynthesis B. Light is necessary for photosynthesis C. Chlorophyll is necessary for photosynthesis D. Water is necessary for photosynthesis

B. Light is necessary for photosynthesis

Mrs. Hadley is teaching her elementary students the concept of symmetrical balance in the art classroom and shows various examples of symmetry in the natural environment. What lesson idea would best help her integrate science content and art content together in a lesson? A. Growing butterflies and then creating observational drawings B. Observing butterflies, learning about their body parts, documenting their colors, and using patterns and then creating a butterfly using cutting techniques for symmetry and balance C. Studying butterfly habitats and painting a habitat a butterfly would live in D. Creating butterflies from their imagination using construction paper an scissors while learning about natural environments

B. Observing butterflies, learning about their body parts, documenting their colors, and using patterns and then creating a butterfly using cutting techniques for symmetry and balance

Sixth graders in Mrs. Anderson science class just finished building a simple device to measure the earths air pressure. Next, the teacher asked students to go to the Internet to learn more and write a paragraph listing one benefit of integrating such an instrument in smart phones. The students reported back the results of the research. Which of the following results correctly represents the interconnected understanding of the concept the students just learned? A. One benefit is that gamma ray readings derived from this instrument inside the smart phone can pinpoint radiation levels in an area. B. One benefit is that elevation readings derived from this instrument inside the smart phone greatly improves navigation information for its GPS C. One benefit is it this instrument turns a smart phone into a seismometer which allows emergency response teams to quickly pinpoint an earthquakes epicenter and get resources to the right places more quickly D. One benefit of such integration is that smart phones become precision instruments used at home or at a construction site, like a carpenters level, for hanging pictures, tower, etc.

B. One benefit is that elevation readings derived from this instrument inside the smart phone greatly improves navigation information for its GPS

Before class, Miss Ely went outside to the school lawn and scattered equal numbers of colored yarn onto a designated area. Some of the small pieces of yarn were green like the grass, while others are brown, red, blue, and yellow. During the lesson two students at a time were to race to the designated area and pick up the first piece of yarn they saw. Even though only 20 out of the 50 pieces of yarn we found, most of the yarn was red or yellow. Miss Ely asked the students to think about how the yarn could represent animals living in an ecosystem and how they can represent predators. What is the most important concept students should have learned in this activity? A. Brightly colored animals living in an ecosystem are almost certain to die B. Organisms that blend in with their surroundings generally live long enough to pass on this beneficial traits to their offspring C. The most attractive organisms are generally chosen to pass there genes onto their offspring D. Organisms such as plants and animals vary greatly in their color

B. Organisms that blend in with their surroundings generally live long enough to pass on this beneficial traits to their offspring

During a life science unit, an elementary teacher placed several sprouting bean plants in a windowless closet. She places a grow light so that the light shines on the plants from the right side. Students observe the growth of the plans for one week. The following week, the teacher move the lamp to the left side of the plants. The students observed that the plant stems lean to the right during the first week and then to the left in the second week. These results best demonstrate that- A. Artificial light interferes with photosynthesis in plants B. Plant growth patterns are influenced by external stimuli C. Plants are able to evolve and adapt readily to changes in the environment D. Several basic needs must be met for plants to grow successfully

B. Plant growth patterns are influenced by external stimuli

Students in Ms. Doziers sixth-grade classroom are conducting an experiment to compare the amount of sugar that can be dissolved in ht tea and cold tea. Each group has added a teaspoon of sugar into each beaker of tea and stirred three times. Students continue to add sugar until a precipitate forms at the bottom of the beaker. what concept will studnet soon discover about matter in this experiment? A. The boiling point of water can be changed by adding sugar to tea B. Solubility increases with increasing temperatures C. Sugar is insoluble in tea D. As the temperature of the solvent decrease, the solubility of the solute increases

B. Solubility increases with increasing temperatures

According to the theory of natural selection, why are some individuals more likely than others to survive and reproduce??? A. Some individuals pass on to their offspring new characteristics they have acquired during their lifetimes B. Some individuals are better adapted to exist in their environment than others are C. Some individuals do not pass on to their offspring new characteristics they have acquired during their lifetimes D. Some individuals tend to reproduce fewer offspring than others in the same environment

B. Some individuals are better adapted to exist in their environment than others are

A box on a table is subjected to a push from the left. At the same time, it is subjected to a push with greater force directly opposite on the right. Which of the following statements describes what will happen to the box? A. The box will move at an angle perpendicular to the applied forces B. The box will move toward the left side of the table C. The box will move back and froth on the table D. The box will rotate in a counter-clockwise motion

B. The box will move toward the left side of the table

Mr. Horn is teaching his fourth grade students about the process in which ions are formed. He asked students to role-play the part of protons, neutrons, and electrons that make up two different atoms. He then explains the process by which electrons are lost to the other atom while the actors role-play for the rest of the class. The strategy described in this passage is effective in teaching students understanding of this process primarily because - A. The students are more likely to pay attention since the role-play is enjoyable B. The role-play allow students at this age to visualize a very abstract concept C. The students are actively engaged and involved in the lesson D. It effectively activates prior knowledge

B. The role-play allow students at this age to visualize a very abstract concept

Which of the following best describes the value of having students identify how they may have deviated from an experimental procedure when repeated trials produce different results? A. The task forces students to support their hypothesis B. The task helps students to recognize possible sources of error C. The task keeps students busy for the time remaining in the lesson D. The task helps students understand that results are unrelated to procedures

B. The task helps students to recognize possible sources of error

Of the following, which is a widely accepted explanation that is supported by a large body of observational and experimental evidence? A. Fact B. Theory C. Prediction D. Hypothesis

B. Theory

Sixth grade students in Miss Sandifers class are working on a question design to measure their knowledge of the organization of cells in the human body. The statement below is posted on the board. Choose a series of words that will correctly complete the statement. A group of cells working together to carry out a particular job is called _____________. A group of these working together to carry on a particular job are called ___________. A group of these working together to carry out a particular job are called a _________. A group of these working together to do a particular job make up a _______. A. Organelles, organ, system, tissue B. Tissue, organs, system, organism C. Tissue, organelle , organ, organism D. Organism, tissue, system, organs

B. Tissue, organs, system, organism

Students were given 2 trials at a time and required to draw conclusion. The first conclusion from the data differed from the final conclusion once all of the data was revealed. What was the purpose of the activity? A. To analyze different explanations for a given experimental result B. To demonstrate that repeated trials increase the reliability of data C. To teach how to conduct a basic scientific investigation D. To evaluate the precision of data collection techniques in the class

B. To demonstrate that repeated trials increase the reliability of data

Mrs. Russ is planning a lesson on internal stimuli versus external stimuli for her sixth grade students. She wants to use photos for each type of stimulus. Which of the following samples best illustrates an internal stimulus? A. A child moves her hand quickly when touching a hot stove B. A child covers her ears when a loud noise occurs C. A child drinks milk from a bottle when she is hungry D. A child covers himself with a blanket when it gets cold

C. A child drinks milk from a bottle when she is hungry

Which of the following lists of equipment is most appropriate for a density investigation? A. A marble, track, ruler B. A barometer, thermometer, and weather vane C. A graduated cylinder, overflow container, and balance D. A compound microscope, slides, and eyedropper

C. A graduated cylinder, overflow container, and balance

Doing a science activity the teacher, Miss Sanderson, asked for her sixth grade students to close her eyes and sit quietly for two minutes. She then asked them to run in place for two minutes and identify the body systems that were affected by the exercise. Even though the list is incomplete, which of the following is the best answer for this question? A. Circulatory and muscular B. Circulatory, muscular, and respiratory C. Circulatory, excretory muscular, respiratory D. Circulatory, excretory, muscular, and genotype

C. Circulatory, excretory, muscular, and respiratory

Ms. Sullivan is teaching a lesson to her 2nd-grade students on the environment and focuses on the adaptation and habitat of frogs. She wants her students to learn about the life cycle of frogs, what they require in order to thrive, what they eat, and how they interact with other wildlife. Which activity would have the most instructional impact on the students? A. Read a book about frogs B. Conduct a field trip to the zoo C. Construct a terrarium D. Watch an age-appropriate scientific movie about frogs

C. Construct a terrarium

Of the following, which is thought to be most responsible for the warming of Earth's atmosphere since the late 1800s? A. Changing wind patterns B. Decreasing atmospheric pressure C. Increasing carbon dioxide emissions D. The thinning of the ozone layer

C. Increasing carbon dioxide emissions

Sarah and Keith are making candy for a holiday party and begins to argue about whether the melting sugar is a chemical or physical change. He says his teacher, Miss Ortega, so physical changes are only a change in the state of matter, not a change in the chemicals that make up the material. Sarah argues the melting sugar is a change the chemical make up of the sugar because it does not look like sugar anymore. Who is right? A. Both Sarah and Keith are correct; it depends on the type of sugar they used B. Sarah is correct; Melting sugar is a chemical change. The bonds between sugar molecules are broken when he was applied C. Keith is correct; melting sugar is a physical change because only the state of matter was changed. After melting, the sugar is still sugar but in a liquid state D. Both Sarah and Keith are correct; when the sugar was only warm it was a physical change and when it melted it became a chemical change

C. Keith is correct; melting sugar is a physical change because only the state of matter was changed. After melting, the sugar is still sugar but in a liquid state

Which of the following characteristics is most likely to distinguish an organism as a member of the class Insecta? A. Habitat B. Average weight C. Number of pairs of legs D. Number of eggs laid in one season

C. Number of pairs of legs

Which of the following activities is most effective when assessing students' abilities to use science process skills? A. Students writing about science process skills in a journal entry B. Students completing a multiple-choice test about key science process skills C. Students designing and implementing hands-on tasks to find a solution to a problem D. Students interpreting a picture that shows a scientist conducting an experiment in a laboratory

C. Students designing and implementing hands-on tasks to find a solution to a problem

Miss Bess plans to peak her sixth grade students interest in genetic and hereditary by introducing her unit with questions about twins. Which of the following statements is not true about twins? A. Children who are twins can be different genders for example a boy and a girl B. Identical twins are formed from the same fertilized egg C. The height of identical twins will be the same when they reach adulthood because they both contain the same genes for height D. Even though twins may look identical, they do have some variation in their genetic makeup

C. The height of identical twins will be the same when they reach adulthood because they both contain the same genes for height

Suppose that one spring a new type of large fish was put into the pond. So many were put in there that there were twice as many fish as before. By the end of the summer, what would happen to the large fish that were already in the pond? A. The population would increase B. The population would remain the same C. The population would decrease D. The population would become the top carnivore

C. The population would decrease

Which of the following is a correct sequence in the lifecycle of a butterfly? A. The adult emerges from the caterpillar B. The pupa hatches from the egg C. The pupa develops from the caterpillar D. The caterpillar emerges from the pupa

C. The pupa develops from the caterpillar

Tara put an ice cube in a jar, put the lid on the jar, then placed the jar on a scale. The jar and the ice cube weighed 3 units. Tara came back one hour later an the ice cube had meted. Which of the following best describes why the weight did or did not change? A. The weight changed and the arrow should point to 4 units because water is heavier than ice B. The weight changed and the arrow should point to 2 units because ice weighs more than water C. The weight did not change and the arrow should point to 3 units because the melted ice is just in a different form D. The weight did not change and the arrow should point to 3 units because only the ice was taken out of the system

C. The weight did not change and the arrow should point to 3 units because the melted ice is just in a different form

Most of the water in the atmosphere is found in the- A. Mesosphere B. Thermosphere C. Troposphere D. Stratosphere

C. Troposphere

Of the following substances, which is the best conductor of electricity? A. Wood B. Pure water C. Oxygen gas D. Aluminum

D. Aluminum

Ms. Corpora wants her sixth-grade students to understand the process used in scientific investigation. She wants them to realize that scientists continually form a hypothesis about ways to solve a problem, test the hypothesis, form a conclusion, and then revise the hypothesis and begin the process again until the problem is solved. Which of the following activities would MOST effectively help students understand this? A. Give the students a well designed experiment and ask them to follow the procedures carefully and think about the sequence of steps the experiment followed. Small groups would compare the steps to the process discussed earlier in the lesson B. Ask students to research investigations on the Internet and choose one that follows the scientific method they discussed earlier C. MS. Corpora would explain the process of scientific inquiry. She would then ask small groups of students to refer to their textbook and design an experiment that resembles the example D. Ask students to make a paper airplane that can fly at least 30 meters in a straight line. After students test the airplanes several times, she will stop and ask them to think about the steps they went through from one trial to the next

D. Ask students to make a paper airplane that can fly at least 30 meters in a straight line. After students test the airplanes several times, she will stop and ask them to think about the steps they went through from one trial to the next

Miss Phillips is a beginning first grade teacher. She understands she will be responsible for developing lessons and activities based on grade appropriate science curriculum. As She presents concepts and introduces her students to concepts embedded within a science lesson, she'll want to focus on which of the following as a possible extension activity? A. Watching videos on the topic B. Reading books on the topics C. Conducting field trips D. Constructing models

D. Constructing models

Which of the following student activities will most effectively help students overcome their misconceptions about how clouds form? A. Adding to their science journals a published research paper about how clouds form B. Placing on the wall of the classroom index cards with vocabulary words related to how clouds form C. Keeping a cloud journal over the course of a week, describing the types of clouds that are seen at three times during each of the days D. Discussing with the teacher how a cloud is formed when the teacher uses a partially filled jar of hot water, hair spray, and a tray of ice cubes to create a cloud in a jar

D. Discussing with the teacher how a cloud is formed when the teacher uses a partially filled jar of hot water, hair spray, and a tray of ice cubes to create a cloud in a jar

Sarah looked at some pond water with a microscope. She used the low-power objective lens to look at some green algae. If Sarah switched the lens from low power to high power what would she see in the field of view? A. A lot more cells than with the low-power view, but in lesser detail B. The same number of cells as with the low-power view, but in lesser detail C. The same number of cells as with the low-power view, but in a greater detail D. Fewer cells than with the low-power view, but in greater detail

D. Fewer cells than with the low-power view, but in greater detail

Which of the following is generally an advantage of sexual reproduction over asexual reproduction? A. A shorter generation time B. The production of larger numbers of offspring C. The prevention of mutations D. Greater variation in the genetic makeup of a population

D. Greater variation in the genetic makeup of a population

What term is used to refer to the water vapor content of air and what instrument do meteorologist use to measure it? A. Rainfall; rain gauge B. Atmospheric pressure; barometer C. Atmospheric pressure; anemometer D. Humidity; hygrometer

D. Humidity; hygrometer

Raymond is on his skateboard moving with a certain amount of motion energy. He stops pushing forward and begins to slow down. While he is slowing down most of the energy is transformed into thermal energy of the rubbing wheel parts of the skateboard. The rest of the energy - A. Is destroyed during the friction interaction between the wheel parts B. Disappears to be used elsewhere in the surroundings C. Is transformed into the motion energy of the skateboard D. Is transferred to the surroundings

D. Is transferred to the surroundings

Which is the following accurately describes what we know about the earths crust? A. It is made of molten lava composed of iron and nickel B. It is approximately 10 miles thick and is floating on a liquid core made of iron and nickel C. It is a solid ball of rocky materials that has a magnetic field D. It is divided into seven plates to move around in different directions and sometimes crash in one another

D. It is divided into seven plates to move around in different directions and sometimes crash in one another

Jessie enjoys hiking to the top of Rock Hill when he visits his grandparents' ranch. He studies rocks and adds the BEST ones to his collection. After many summers of exploring, he has decided that Rock Hill was completely under water at one time. Which statement below BEST supports his conclusion? A. There is more evidence of wind and water erosion from year to year B. Rock Hill is the highest point for many miles C. There are several different varieties of trees and flowers on Rock Hill D. Many of his rocks contain imprints of shells

D. Many of his rocks contain imprints of shells

Which of the following is most effective as a part of a program to promote health in the United States? A. Eating large meals to consume a high number of vitamins B. Being outside all day to maximize exposure to sunlight C. Sleeping an average of five hours per night to allow more time for hobbies D. Modifying lifestyle to increase aerobic activities

D. Modifying lifestyle to increase aerobic activities

Isabel is very interested in gerbils and wants to use her pet gerbils in this year's science fair experiment. She questions her teacher about conducting an experiment to determine the effects of varying levels of hormones on secondary sexual characteristics in young gerbils. How should the teacher respond? A. Students should not use vertebrates in science fair experiments B. There are ethical consideration int he use of animals for science fair projects and parents should discuss these with their children C. The teacher must determine whether the animals will be harmed during the experiment D. Most science fair projects involving the use of animals must be approved by a school district review board

D. Most science fair projects involving the use of animals must be approved by a school district review board

Students in Mr. Rodriguez's sixth-grade class are busy reviewing their folders containing graded assignments submitted during the first semester. They were asked to compare their knowledge/skills on assignments representing their first attempt at experimental design and then their most recent attempt. Which of the following MOST accurately describes the form of assessment Mr. Rodriguez was implementing during this process? A. Performance assessment B. Lab journals C. Student checklists D. Portfolios

D. Portfolios

In the laboratory investigation where students are tasked with measuring the rate of change of a ball rolling down a ramp, students must collect data from a stop watch as the ball rolls down the ramp. The teacher sets the minimum of trials to measure at five. How does the use of repeated trials reduce the amount of error in the experiment? A. Repeated trials allow the students to become familiar with the equipment as well as offer more time to process the information from lecture B. Repeated trails reveal the pattern of the scientific phenomenon which is the subject of the experiment. If the concepts do not revel them selves, students must conduct more trials. C. Repeated trials allow students to determine if their data collecting techniques produce accurate and precise data. The analysis determines if the data is accurate D. Repeated trials allow students to collect more data and ensure that the data collected is accurate and precise. If the numbers are not similar, students know that there is an error in the procedure

D. Repeated trials allow students to collect more data and ensure that the data collected is accurate and precise. If the numbers are not similar, students know that there is an error in the procedure

Which of the following is the primary advantage of designing and conducting laboratory experiments rather than relying on observation of the natural world? A. Unlike observations conducted in the natural world, experiments int eh laboratory do not require repetition for the purpose of conforming the results B. Since phenomena in the natural world rarely behave in consistent ways, observations yield less accurate results than those obtained from lab experiments C. New hypothesis can be generate more readily from the results of laboratory experiments than from observations of the natural world D. Since selected variables can be controlled more easily in the laboratory than in the natural world, cause-and-effect relationships can be detected more easily

D. Since selected variables can be controlled more easily in the laboratory than in the natural world, cause-and-effect relationships can be detected more easily

A change in the DNA of which of the following types of cells in a mammal can be passed to future offspring? A. Skin B. Nerve C. Blood D. Sperm

D. Sperm

Of the following, which is most effective at engaging students in scientific inquiry? A. Telling students which science concepts will be explored B. Assigning students to groups of mixed abilities C. Providing a list of the tools available for use during the next hands-on activity D. Suggesting that students explore a solution to a problem that is relevant to their daily lives

D. Suggesting that students explore a solution to a problem that is relevant to their daily lives

The majority of Earth's nitrogen is found in: A. Water B. Plants C. The soil D. The atmosphere

D. The atmosphere

Which of the following best predicts what will happen when two objects of the same shape and volume, but different masses, are dropped from shoulder height at the same time ? (Assume air resistance is negligible) A. The objects will reach the ground at different times because their weights are different B. The objects will reach he ground at different times because their densities are different C. The objects will reach the ground at the same time because their magnetic forces are the same D. The objects will reach the ground at the same time because their accelerations due to gravity are the same

D. The objects will reach the ground at the same time because their accelerations due to gravity are the same

Of the following, which describes a chemical reaction? A. The mixing of oil and water during an oil spill B. The evaporation of water during the water cycle C. The slicing of bread during a meal D. The production of gas by yeast cells during bread making

D. The production of gas by yeast cells during bread making

All of the following statements concerning exothermic reactions are correct, except - A. An exothermic reaction is a chemical reaction accompanied by the release of heat B. The energy needed for an exothermic reaction to occur is less than the total energy released C. The result of an exothermic reaction is the release of extra energy D. The word exothermic meaning within heating describes the process or reaction that absorbs energy in the form of heat

D. The word exothermic meaning within heating describes the process or reaction that absorbs energy in the form of heat

An air mass that originates over the Gulf of Mexico, or another large body of water that is close to the equator, is most likely to be: A. Cold and dry B. Cold and moist C. Warm and dry D. Warm and moist

D. Warm and moist

How many Earths can fit inside the Sun?

One million