The Water Cycle

Which of the following is NOT a factor in atmospheric conditions?

• Temperature

• Wind

• Clouds

• Soil

What is evaporation?

• When a gas turns into a liquid due to thermal energy (heat).

• When a liquid turns into a gas due to thermal energy (heat).

• When a solid turns into a liquid due to thermal energy (heat).

• When a gas turns into a solid due to thermal energy (heat).

What causes the liquid water molecules to move faster and eventually escape the liquid?

• Cold energy from the moon.

• Thermal energy from the sun.

• Wind energy from the atmosphere.

• Magnetic energy from the Earth.

What is humidity?

• The amount of water vapor present in the air.

• The amount of oxygen present in the air.

• The amount of carbon dioxide present in the air.

• The amount of nitrogen present in the air.

What is condensation?

• When a liquid turns into a gas

• When a gas turns into a liquid

• When a solid turns into a gas

• When a liquid turns into a solid

What happens to water vapor molecules in the air when they begin to cool?

• They speed up and spread out

• They slow down and start to clump together

• They turn into ice

• They disappear

What is formed when water vapor molecules in the air clump together?

• Rain

• Snow

• A cloud

• Fog

What do the molecules in the water vapor do when they become cold?

• They speed up

• They disappear

• They slow down and clump together

• They change color

When does precipitation occur?

• When water droplets in clouds become too large for the cloud to support them.

• When water droplets in clouds evaporate.

• When water droplets in clouds freeze.

• When water droplets in clouds are absorbed by plants.

Which type of precipitation occurs when water freezes inside a cloud before it falls?

• Rain

• Snow

• Sleet

• Hail