Thermal Energy Review

What happens to a thing's molecules when it gets hotter?

• They move slower

• They move faster

• They stay the same

What happens to a thing's molecules when it gets colder?

• They move slower

• They move faster

• They stay the same

What is temperature a measure of?

• The color of things

• The weight of a thing

• The average speed of the molecules

What is the smallest unit of a thing?

• Atoms

• Molecules

• Elements

What are molecules made of?

• Atoms

• Elements

• Compounds

What happens to the kinetic energy of molecules when an object gets hotter?

• It decreases

• It increases

• It stays the same

What happens to the speed of molecules when an object gets colder?

• It decreases

• It increases

• It stays the same

What is temperature a measure of?

• The speed of molecules

• The volume of an object

• The average kinetic energy of the molecules of an object

What happens when two objects are in contact?

• The speed of their molecules decreases

• Their molecules collide and transfer kinetic energy

• Nothing happens

Can energy be created or destroyed?

• Yes

• No

• Maybe?