Practice Problems: Praxis 5005 (Science)

Life Science: Red plants have the dominant trait for color (R), while white plants have the recessive trait for color (r). How many red plants and white plants are produced when Rr x Rr are crossed? A. 3 red plants; 1 white plant B. 1 red plant; 3 white plants C. 2 red plants; 2 white plants D. All red plants

A. 3 red plants; 1 white plant

Physical Properties of Matter: Which of the following laboratory instruments would be most appropriate to use in determining the volume of a large block of wood of unknown density? A. A metric ruler B. A triple-beam balance C. A 200 mL volumetric flask D. A micrometer

A. A metric ruler

The boiling of water is an example of: A. A physical change B. A chemical change C. Sublimation D. Condensation

A. A physical change

What causes the motion of glaciers? A. Gravity B. Erosion C. Wind D. Temperature change

A. Gravity

Earth Space Science: Mr. Lopez is teaching a unit on seasons. He explains why summer days are longer and winter days are shorter. What should Mr. Lopez emphasize regarding Earth when explaining this phenomenon? A. Earth's revolution around the sun B. Earth's tilt on its axis C.Earth's Position in the solar system D. Earth's distance away from the sun

B. Earth's tilt on its axis

Earth Space Science: This type of rock was originally liquid below Earth's crust and is formed by lava and magma. A. Sedimentary B. Igneous C. Metamorphic D. Fossils

B. Igneous

Life Science: Which of the following is the difference between plant cells and animal cells? Choose ALL that apply. A. Plant cells use oxygen and water to make food, while animal cells make ATP from carbon dioxide and sugar. B. Plant cells use carbon dioxide, water, and sunlight to make their own food, while animal cells make ATP from glucose and oxygen. C. Animal cells go through photosynthesis, while plant cells go through cellular respiration. D. Plant cells go through photosynthesis, while animal cells go through cellular respiration.

B. Plant cells use carbon dioxide, water, and sunlight to make their own food, while animal cells make ATP from glucose and oxygen. D. Plant cells go through photosynthesis, while animal cells go through cellular respiration.

Structure of Matter: Which of the following is a chemical element? A. Sodium chloride B. Platinum C. Carbon Dioxide D. Water

B. Platinum

Which of the following is an example of a closed ecosystem? A. Tundra B. Terrarium C. Forest D. Pond

B. Terrarium

What is the definition of work? A. The amount of energy used to accomplish a job B. The force used to move a mass over a distance C. The amount of energy used per unit of time D. Energy stored in an object due to its position

B. The force used to move a mass over a distance

Interactions of Energy and Matter: Of the following, which best describes an example of the Doppler effect? A. As light passes through a prism, the light separates into a rainbow. B. As a light beam passes from air into water, the beam changes direction. C. As an emergency vehicle approaches an observer standing by the road, the pitch of its siren increases. D. As a sound wave hits a wall, it is reflected and creates an echo.

C. As an emergency vehicle approaches an observer standing by the road, the pitch of its siren increases.

Which of the following is needed for an experiment to be considered successful? A. A reasonable Hypothesis B. A well-written lab report C. Data that others can produce D. Computer-aided statistical analysis

C. Data that others can produce

When heat is removed from water during condensation, new ___ is formed. A. Atoms B. Covalent bonds C. Intermolecular bonds D. Ionic bonds

C. Intermolecular bonds

Physical science: During which of the following is condensation occurring? A. Water boiling on a stove B. Plants sucking water up through their roots C. Water droplets forming on the outside of a surface D. A puddle disappearing on a hot day

C. Water droplets forming on the outside of a surface

Chemical Properties of Matter: A chlorine compound is added to a swimming pools in order to A. Monitor the pH of the water B. Add color to the water C. Soften the water by precipitating harmful chemicals D. Destroy bacteria through an oxidation reaction

D. Destroy bacteria through an oxidation reaction

The most recently formed parts of the Earth's crust can be found at: A. Subduction zones B. Compressional boundaries C. Extensional boundaries D. Mid-ocean ridges

D. Mid-ocean ridges

If a coin and two balls of different weights are dropped simultaneously from a height of 10 meters in a vacuum, which of the following will be true? A. The heavier ball will hit the ground first. B. The coin will hit the ground first. C. The lighter ball will hit the ground first. D. The coin and the two balls will all hit the ground at the same time.

D. The coin and the two balls will all hit the ground at the same time.

The Scientific Method: .Ms. Jasper's fourth-grade class is studying plants. They experimented to see if brand-name fertilizer helps plants grow taller than the generic brand fertilizer. .They have three of the same type of plants. All the plants are in the same size container, have the same amount of soil, and receive the same amount of sunlight and water. One plant receives the brand-name fertilizer, on plant receives the generic fertilizer, and one receives no fertilizer. Answer the following questions? 1. What is the independent variable? 2. What is the dependant variable? 3. What is the control? 4. What would make this experiment stronger?

Independent variable (can be manipulated)= Fertilizer Dependant variable (effect or result)= Plant growth or lack of plant growth Control= Plant that recieved no fertilizer Make the experiment stronger= More plants