Topic 4 Test Review

Water on Earth is in the air and underground. Much of the water you cannot see. It is an invisible gas called _______.

• water vapor
• helium

• oxygen

• carbon dioxide

Water vapor is usually the same temperature as the air around it. This is different from steam.

• True

• False

Steam is created when water _______.

• boils
• condenses

• cools down

• forms a cloud

Water on Earth constantly moves in a _______, or a series of events or processes that repeat.

• cycle
• system

As water moves, it never change into different forms.

• True

• False

• gas

_______________________________ is the process of changing liquid water into water vapor.

• Evaporation
• Condensation

• Sublimation

• Precipitation

What causes the air to rise? ________________________________

• wind

• cold water

• heat

• rain

When the temperature cools, the water vapor turns back to a liquid. This is called ______________________________________.

• Condensation
• Runoff

• Precipitation

• Evaporation

Clouds are drops of liquid formed from cooled water vapor.

• True

• False

The __________________________ provides the energy that makes the water cycle work.

• Sun
• wind

• water

• runoff