Unit 2 (8th Grade)

When temperature increases, average _______ increases

• potential energy

• total energy

• kinetic energy

• transfer energy

in years past, people would put a hot water bottle in bed with them to help warm tehri feet. The transfer of the warmth from the water bottle to their feet is call:

• thermal energy

• kinetic energy

• heat

• thermal energy

When a substance is heated the particles gain energy and spread out creating more volume. What happens to the mass of the substance when it is heated

• mass is lost

• mass decreases

• mass goes up

• mass remains same

a hot iron is turned off and cools down to room temperature. The iron cools because

• heat energy is transferred from the warm iron to the cooler room

• heat energy is transferred from the cool iron to the warm air

• the iron does not hold heat

• thermal energy is destroyed

A measure of the average kinetic energy of all the particles is an object

• thermal energy

• vaporization

• temperature

• kinetic energy

change in state of a liquid into a gas

• vaporization

• sublimation

• thermal energy

• work energy

change of state from a solid to a gas without going through the liquid state

• vaporization

• temperature

• heat

• sublimation

Energy an object has due to its motion

• temperature

• kinetic energy

• cooling

• potential energy

the total potential and kinetic energies of an object

• cooling

• sublimation

• condensation

• thermal energy

change in state of a gas into a liquid

• temp

• cooling

• thermal energy

• Condensation