Amplify Science Unit 3 Chapter 3

An objects motion can be changed by

• a push or a pull

• weight

• temperature

• size

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Throwing a ball and moving a chair are an example of 

• pushes

• pulls

• gravity

• weight

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A force is a push or a pull.

• True

• False

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What is a PUSH or PULL of an object?

• Motion

• Force

• Friction

• Gravity

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A group of atoms joined together in a

particular way is called a/an _

• atom

• molecule

• mixture

• substance

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Sally is doing an experiment about mixtures and solutions. Which of her ingredients will probably NOT dissolve in water?

• dirt

• salt

• koolaid mix

• sugar

Recall what happened to the dye and water molecules during chromatography. What caused the water molecules to attach to the dye and travel up the paper?

• volume

• attraction

• push

• magnetism

Your teacher places a piece of paper on a desk and then uses a fan to blow air at the paper. The paper flies off the desk and flutters to the ground. Which statement best

describes what happened?

• The teacher moved the paper.

• The fan pushed the paper off the desk.

• The desk was not built to hold the paper.

• The fan moved the air, and the molecules of air pushed the paper off the desk.

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Priya's family makes cheese from milk. Priya says this is a physical change. Priya's mother says this is a chemical change. Who is correct, and why?

• Priya is correct. The cheese still contains milk.

• Priya is correct. The milk changes from liquid to solid.

• Priya's mother is correct. The cheese cannot be changed back into milk.

• Priya's mother is correct. The weight of the cheese is the same as the weight of the milk.

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When the molecules of a solid are attracted to the molecules of a liquid, they

• stay clustered together as a solid.

• spread apart and mix together evenly.

• separate into layers.

• evaporate into the air.

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