integrated science a - unit 1: exam

atoms of different elements have a different mass and volume. why is the statement true?

atoms have unique properties that define them.

which statement describes what levi did to prepare the control group in his experiment?

levi did not apply any fertilizer to one of his plants.

which of these physical properties would change depending on how much of a substance you were measuring? select all that apply.

mass volume

examine the analogy and how it compares a part to a whole. link : chain :: atom : _[blank]_​ what option best completes this analogy? select all that apply.

molecule compound

examine the false statement. compounds are the smallest unit of an element that occur most commonly in nature. select the rewording of the statement that is true.

molecules are the smallest unit of an element or compound that commonly occur in nature.

over the period of a few days, a hospital receives an overwhelming increase in the number of patients with food poisoning. how would a scientist respond to this increase in sick patients?

by examining the type and source of foods each patient ate and identifying patterns of overlap within the foods consumed

what error did ivan make in the design of his investigation?

ivan tested more than one independent variable at a time.

which of the following is not an example of a pure element?

co2

what question might an applied science researcher ask about wind?

how can wind be used to generate electricity?

what was the total distance traveled after 2.3 seconds?

175 meters

what is the range for the total growth of plants a through d?

4 cm to 46 cm

which sentence from the scenario best shows sherry's lack of understanding about the physical properties of her lip balm?

5

which hypothesis is supported by the data in the table?

a plant's health is affected by the amount of nutrients it receives, so increasing the amount of fertilizer a plant receives will increase the rate at which it grows.

which of the following is an inorganic compound?

ammonia

which statement best explains why elements are matter?

an element is a physical substance that has mass and takes up space.

what are the smallest units an element can be broken down into and still retain its defining properties?

atoms

when barium hydroxide mixes with water, the solution turns cold. what is an indicator of a chemical change in the scenario?

change in energy

study the graph and then analyze the statement. the data in the histogram is evenly distributed. determine if the statement about the graph is true or false. if true, choose true. if false, choose the explanation that explains why it is false.

false, the data does not produce a symmetrical shape.

which indicator of a chemical change is shown? https://assets.learnosity.com/organisations/625/tools/asset/media/440720

formation of a gas

review the hypothesis. if the amount of water people drink every day affects the concentration of certain hormones in their blood, then increasing the amount of water consumed daily will decrease the number of facial blemishes they suffer each month. which of the following experimental questions does the hypothesis answer?

how does the volume of water consumed affect the number of facial blemishes that individuals receive every month?

review the experimental question. how does the quantity of zinc used in a mineral-based sunscreen affect an individual's chance of getting a sunburn? which statement forms the best testable hypothesis for the question?

if the quantity of zinc in a mineral-based sunscreen affects the total amount of uva and uvb rays absorbed, then increasing the amount of zinc will decrease an individual's chance of getting a sunburn.

which are advantages of the si system? select all that apply.

it is easy to change from one unit to another. it allows scientists to compare experimental results.

copper turns a green-brown when it is exposed to oxygen in air. what chemical property of oxygen causes this effect?

its reactivity

where should the independent and dependent variables of levi's experiment be placed when graphed? select all that apply.

plant height; y-axis the amount of fertilizer; x-axis

bananas foster is a dessert that is commonly served flaming. chefs use alcohol-based liquids, like rum, to produce this effect. why can rum be used in cooking to serve flaming food?

rum is a very volatile liquid.

how is the work of scientists checked for accuracy?

scientists submit their work to scientific journals, and it is reviewed by their peers.

a doctor sees 10 patients in one day. the following is a list of their ailments. which of the ailments listed had a frequency of three?

seasonal allergies

which image best demonstrates a physical change?

the image of cutting tomatoes with a knife

which statement best explains why the gold and silver in the image are balanced?

the mass of the silver is the same as the mass of the gold.

what experimental factors could have been a possible source of error in norman's investigation?

the temperature and light of the testing room