Phase Change Review

The change in state from a solid to a liquid.

• melting

• freezing

• evaporation

• condensation

the change in state from a liquid to a gas

• melting

• freezing

• evaporation

• condensation

the change in state from a gas to a liquid

• melting

• freezing

• evaporation

• condensation

a pull between two molecules that is always the same for a substance

• freedom of movement

• molecular attraction

• temperature

• molecule

a noticeably different form or state of the same substance

• molecule

• condensation

• evaporation

• phase

a measure of the average kinetic energy of the molecules of a substance

• phase

• molecule

• temperature

• scale

a state of matter with no definite shape or volume

• gas
• solid

• condensation
• evaporation

a state of matter that has no definite shape but has a definite volume.

• liquid
• solid

• gas

• evaporation

Blake is doing a science experiment with a substance in a sealed jar. At first, the substance’s molecules are all moving around each other. What will happen to Blake’s substance if he transfers energy out of the substance and causes a phase change? After the phase change, the substance’s molecules will move ...

• faster and be a gas

• faster and be a liquid

• slower and be a liquid

• slower and be a solid

Owen found two different substances in the basement. Substance 1 and 2 were both liquids at room temperature. He was bored so he added the same amount of kinetic energy to both substances, but only substance 1 changed phase. How are the substances different?

• Substance 1 has a weaker attraction between its molecules than Substance 2. Its molecules now move in place.

• Substance 1 has a weaker attraction between its molecules than Substance 2. Its molecules now move away from each other.

• Substance 1 has a stronger attraction between its molecules than substance 2. Its molecules now move away from each other.

• Substance 1 has a stronger attraction between its molecules than substance 2. Its molecules now move in place.