Unit 2 Flashcard Review: States of Matter & Thermal Energy

Front

True or False: Atoms/ molecules in solids do not move or vibrate at all.

Back

False

Front

Thermal energy always moves from object with...

Back

higher temperatures to objects with lower temperatures.

Front

Phase change from liquid to solid is called:

Back

Freezing

Front

When changing a substance from liquid to gas, the energy has to...

Back

INCREASE

Front

Phase change from liquid to gas is called:

Back

Evaporation

Front

What is the definition of thermal energy?

Back

Thermal energy is the total kinetic energy of particles in a substance.

Front

What happens to the particles in a solid when it is heated?

Back

The particles vibrate faster and may eventually break free from their fixed positions.

Front

What is condensation?

Back

Condensation is the phase change from gas to liquid.

Front

What is the process of a solid turning directly into a gas called?

Back

Sublimation.

Front

What is the definition of kinetic energy?

Back

Kinetic energy is the energy of motion.