Week 26: Extra Credit

The water cycle is a process that involves:

• evaporation, condensation, and precipitation

• photosynthesis and respiration

• erosion and sedimentation

• volcanic activity and earthquakes

True or False: The water on Earth is constantly changing from one form to another in a continuous cycle that occurs over and over again.

• True

• False

What is evaporation?

• The change of state from a gas to a liquid

• The change of state from a liquid to a gas

• The change of state from a solid to a liquid

• The change of state from a gas to a solid

Evaporation occurs when ______ is added to a liquid.

• heat

• cold

• pressure

• light

True or False: Water vapor is in the air, but you cannot see it.

• True

• False

In the water cycle, heat is added to water from the ______.

• sun

• moon

• earth

• stars

After the water evaporates, the water vapor is cooled by the air and ________.

• condenses.

• freezes.

• sublimates.

• melts.

Condensation happens when gas changes to a ________.

• liquid.

• solid.

• plasma.

• gas.

What do the tiny drops of water combine together to form?

• Rain

• Clouds

• Snow

• Fog

What happens when the water droplets in clouds get heavy?

• They evaporate

• They fall back to Earth as precipitation

• They form clouds

• They disappear