Freezing & Melting Review

What causes heat?

• How many particles are in a substance

• The spacing of particles in a substance

• The speed of particles in a substance

• The volume of particles in a substance

What is the best definition of temperature?

• The total number of particles in an object

• The total amount of heat in an object

• Measurement of the amount of heat in an object

• Measurement of the average speed of particles

Which best describes freezing?

• A change from solid to liquid

• A change from liquid to solid

• A change from liquid to gas

• A change from gas to solid

Which best describes melting?

• A change from solid to liquid

• A change from liquid to solid

• A change from liquid to gas

• A change from gas to solid

Which best describes melting?

• The particles lose energy, move slower and closer.

• The particles lose energy, move faster and farther apart.

• The particles gain energy, move slower and closer.

• The particles gain energy, move faster and farther apart.

A substance only freezes if it is cold.

• TRUE

• FALSE

Which substances freeze at room temperature? Select ALL that apply.

• Chocolate

• Water

• Aluminum

• Plastic

Which substance melts at room temperature?

• Chocolate

• Ice (Water)

• Aluminum

• Plastic

Which best describes FREEZING?

• The particles stop moving as they get colder.

• The particles lose energy and get very close.

• The particles gain energy and get farther apart.

• The particles move very fast and become a gas.

Which best describes MELTING?

• The particles stop moving as they get colder.

• The particles lose energy and get very close.

• The particles gain energy and get farther apart.

• The particles move very fast and become a gas.