AnswersGA-GSE Physical Science AChemical Properties

Chemical Properties — Unit test Answers

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21
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When hydrogen peroxide bubbles, it is undergoing a chemical change. Which statement best describes what is happening?

A
The atoms in hydrogen peroxide are breaking apart and forming new types of molecules.
B
The atoms in hydrogen peroxide are breaking apart and recombining into the original molecules.
C
The molecules of hydrogen peroxide remain intact as new types of molecules form and move out of the liquid.
D
The molecules of hydrogen peroxide remain intact but move more quickly to allow evaporation.
22
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The atoms in a sample are close together but can slide past one another. As the atoms lose energy, they move slower. The atoms become locked in place because of attractive forces between them.

A
gas to solid
B
gas to liquid
C
liquid to solid
D
solid to liquid
23

Which example illustrates a chemical change?

A
shredding paper
B
smashing a soda can
C
burning wood
D
chopping wood
24

Which statement gives two characteristics of all liquids?

A
They spread out to fill space and have atoms that vibrate in place.
B
They have atoms that vibrate in place and have a definite shape.
C
They will change shape to fit a container and have definite volume.
D
They have definite volume and have atoms that move freely in all directions.
25

If a person has the values for an object’s density and volume, what value can be calculated?

A
the object’s size
B
the object’s mass
C
the shape the object forms in a container
D
the amount of space the object takes up
26

An amount of nitrogen undergoes a physical change and increases its volume. What can be known about this physical change?

A
The boiling point of the nitrogen increased.
B
The mass of nitrogen increased.
C
The color changed.
D
The density changed.
27

Chanel has some cotton candy that came in a cloudy shape. She wants to make it more dense. Which describes the candy before and after Chanel manipulated it?

A
The candy before was a cube, and the candy after was a ball.
B
The candy before was compacted, and the candy after was fluffy.
C
The candy before was fluffy, and the candy after was compacted.
D
The candy before was a ball, and the candy after was a cube.
28

Which state(s) of matter have no definite shape or volume?

A
liquids and solids
B
liquids and gasses
C
gasses
D
solids

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