AnswersTX-Integrated Physics and Chemistry A-CRUnit Test

Changes of State Answers

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Which statement best describes the atoms of the gas neon?

A
They slide past each other.
B
They move freely in all directions.
C
They vibrate in place.
D
They are packed closely together.
2
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Which liquid is the most viscous?

A
syrup
B
water
C
milk
D
apple juice
3

Which best describes why a liquid needs a container when a solid does not?

A
Solids fill their containers, and liquids have definite shapes.
B
Solids have definite shapes, and liquids fill their containers.
C
Solids particles will expand to fill their containers, and liquid particles will expand as well.
D
Solids particles expand to fill their containers, and liquid particles do not.
4

An analogy makes a comparison between objects based on their similar qualities. Cassidy wanted to create an analogy for the motion of atoms in solids, liquids, and gases, so she compared them to marbles in a tray.

A
A solid is like the tray being shaken and the marbles moving around it, and a liquid is like the tray being shaken slowly and all the marbles moving in their positions.
B
A solid is like the tray being shaken slowly and all the marbles moving in their positions, a liquid is like the tray being shaken and the marbles moving around it, and a gas is like the tray being shaken hard and the marbles moving vigorously around it.
C
A gas is like the tray being shaken slowly and all the marbles moving in their positions, and a solid is like the tray being shaken hard and the marbles moving vigorously around it.
D
A liquid is like the tray being shaken hard and the marbles moving vigorously around it, and a gas is like the tray being shaken slowly and all the marbles moving in their positions.
5

Density involves the amount of a material in a certain volume. When a material changes phases, it changes in density in a predictable way as the amount of material stays the same but the molecules get farther apart or closer together. Water has solid and liquid states that do not follow these predictions of density in the phases of matter.

A
The solid state is the most dense, followed by the liquid state, then the gas state.
B
The solid state is more dense than the liquid state.
C
The liquid state is more dense than the solid state.
D
The gas state is the most dense, followed by the liquid state, then the solid state.
6

Which statement describes all solids?

A
They contain loosely packed atoms.
B
They have a definite shape and volume.
C
They have a smooth, rigid surface.
D
They flow with resistance.
7

Gerry is looking at salt under a powerful microscope and notices a crystalline structure. What can be known about the salt sample that Gerry is looking at?

A
The atoms have spread out from each other.
B
The atoms are sliding past each other.
C
The atoms have no particular pattern.
D
The atoms are vibrating in place.
8

Density describes how much mass is contained in a certain volume. Knowing how far apart molecules are in each state, which best ranks solids, liquids, and gasses from least dense to most dense?

A
Gasses are denser than liquids.
B
Liquids are denser than solids.
C
Gasses are less dense than solids.
D
Solids are less dense than liquids.
9

Gold’s natural state has a definite shape and a definite volume. What is gold’s natural state(s)?

A
solid
B
liquid
C
solid or gas
D
liquid or gas
10

Mercury’s natural state is where the atoms are close to each other but are still free to pass by each other. In which state(s) could mercury naturally exist?

A
gas
B
liquid
C
solid or liquid
D
solid or gas

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