Schoolnet Review - Water Cycle

How do plants contribute to the water cycle?

• Plants cool the air and create condensation.

• Plants warm the air and create precipitation.

• Plants give off water through transpiration.

• Plants give off water in the form of runoff or groundwater.

Why is the sun’s energy necessary for the water cycle?

• It is the heat source that turns water into vapor.

• It is the light source that turns water into vapor.

• It is the heat source that turns vapor into water droplets.

• It is the light source that turns vapor into water droplets.

Which experiment would most resemble the complete water cycle?

• watering plants

• burning wet wood

• water flowing from a faucet

• boiling a pot of water with a lid on it

Which provides the energy for most life cycles on Earth?

• sun

• soil

• clouds

• animals

Which two processes increase the amount of water vapor in the atmosphere as a result of heat from the sun?

• surface run-off and transpiration

• condensation and precipitation

• evaporation and condensation

• transpiration and evaporation

In order for clouds to form, what must happen first?

• Heat energy from the sun changes water in clouds from a gas to a liquid.

• Light energy from the sun changes water on earth from a gas to a liquid.

• Light energy from the sun changes water in clouds from a liquid to a gas.

• Heat energy from the sun changes water on earth from a liquid into a gas.

A container is placed in front of a heat lamp. After a few hours, water droplets begin to form on the container. Which part of of the water cycle does this best demonstrate?

• evaporation

• precipitation

• transpiration

• condensation

The sun shines on the lake and water vapor rises from the lake into the atmosphere. The vapor cools and becomes water droplets in the clouds. The droplets return to Earth as rain, snow, or hail in a continuous cycle. Which is the correct sequence for these processes?

• condensation, evaporation, and runoff

• runoff, transpiration, and evaporation

• evaporation, condensation, and precipitation

• precipitation, evaporation, and transpiration