Heat and kinetic energy

Which type of motion in the figure best represents the movement of gas particles?

• Motion 1

• Motion 2

• Motion 3

• Motion 4

What happens to matter as its temperature increases?

• The average kinetic energy of its particles decreases

• The average thermal energy of its particles decreases

• The particles gain kinetic energy

• The particles lose potential energy

What must happen for molecules to move slower?

• Kinetic energy is not changing. Temperature decreases.

• Kinetic energy and temperature depend on the molecules.

• Kinetic energy is decreasing and temperature is decreasing.

• Kinetic energy is decreasing and temperature is increasing.

What happens to molecules when their kinetic energy increases?

• They move slower.

• They move faster.

• They get heavier

• It depends on the type of molecules

The temperature at which solid turns to liquid

• boiling point

• melting point

• freezing point

• condensation point

The temperature at which liquid turns into vapor

• melting point

• freezing point

• boiling point

• condensation point

This is the smallest unit of matter

• molecules

• atoms

• particles

How does heat move?

• hot to cold object

• cold to hot object

• hard to soft object

• soft to hard object

Temperature

• The total kinetic and potential energy of all the particles in an object.

• Energy that is transferred from a warmer object to a cooler object.

• A measure of the average kinetic energy of the particles in a substance.

• The heating of a substance that causes its particles to move more quickly.

Energy is defined as

• power

• food

• ability to produce heat

• ability to do work or cause change