Pretest

Question 1

During which changes of state do atoms overcome the attractive forces between them?

Revolt · Accepted Answer

C: vaporization and sublimation

Question 2

Freida wants to model the way atoms move when a substance changes its state. To do this, Freida makes a pyramid of marshmallows. Then, she knocked down the pyramid causing the marshmallows to fall. If the marshmallows represent the atoms in the substance, which change of state is Freida modeling?

Revolt · Accepted Answer

C: melting

Question 3

During which changes of state does the motion of the atoms decrease?

Revolt · Accepted Answer

D: freezing and condensation

Question 4

During which change of state would the volume of a substance increase the most?

Revolt · Accepted Answer

C: sublimation

Question 5

Which statement best describes the energy changes associated with evaporation and boiling?

Revolt · Accepted Answer

C: Atoms gain energy during evaporation and boiling.

Question 6

Which is the process by which a solid changes to a liquid?

Revolt · Accepted Answer

A: melting

Question 7

As atoms gain energy, they move faster and slide past one another more easily. Atoms at the surface of the substance overcome attractions to nearby atoms and break free of the surface. Which change of state is taking place?

Revolt · Accepted Answer

B: liquid to gas

Question 8

What happens if atoms lose energy during a change of state?

Revolt · Accepted Answer

A: The atoms are pulled together by attractive forces and become more organized.

Question 9

On a cool morning, Uyen’s breath can form a cloud when she breathes out. Which changes of state are most responsible for Uyen seeing her breath in this way?

Revolt · Accepted Answer

C: condensation

Question 10

What happens during evaporation?

Revolt · Accepted Answer

A: A liquid changes to a gas.

Pretest Answers

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