Phases of Matter

A gas

• has a definite shape but no definite volume

• has a definite volume but no definite shape

• has fast-moving particles

In a solid, the particles

• vibrate in place

• slide past one another

• overcome the strong attraction

What happens to the average kinetic energy of matter when it is heated?

• It increases

• It decreases

• It doesn't change

• It cannot be determined

At higher temperatures...

• particles in an object have less energy

• particles in an object move faster

• a gas contracts

What is happening in the statement below?
The ice cube melted.

• Matter is changing from a liquid to a solid.
• Matter is changing from a liquid to a gas.
• Matter is changing from a solid to a liquid.
• Matter is changing from a gas to a liquid.

When heat is added to a liquid, it ______________.

• freezes
• evaporates
• melts
• condenses

Liquids and gases are similar because __________________________.

• they both take the shape of their container
• they both have their own shape
• liquids pour and gases don't
• liquids take the shape of the container but gases have their own shape

The drops of water that appear on the outside of a glass of cold juice on a warm day are an example of?

• Sublimation: A solid turning into a gas.

• Condensation: A gas changing to a liquid.

• Evaporation: A liquid changing to a gas.

• Deposition: A gas changing to a solid.

A substance that has a definite shape and volume.

• evaporation

• gas

• liquid

• solid

In an exothermic reaction, heat is ...

• taken in
• given out