grade 6 , con 4 , lesson 3

Changing from gas state to liquid state is called

• melting

• evaporation.

• condensation.

When wax melts, its particles

• gain thermal energy and speed up.

• gain thermal energy and slow down.

• lose thermal energy and speed up.

• lose thermal energy and slow down.

In which state(s) of matter are the molecules away from each other?

• Solid.

• Gas.

• Liquid

The state(s) of matter with the greatest amount of energy is/are

• Gas

• solid.

• liquid.

Water molecules have the lowest kinetic energy when it is in the form of

• ice.

• water drops.

• water vapor.

• steam.

Changing ice into water followed by changing water into steam shows two different processes which are ................ and

• evaporation - condensation.

• melting - evaporation.

When the temperature of a matter increases, its molecules move slower.

• True

• False

Hot water molecules have more kinetic energy than cold water.

• True

• False

Food coloring (dye) spreads out in cold water faster than in hot water.

• True

• False

Temperature is a measure of the average kinetic energy of the molecules

• True

• False