1.3 Review

Which of the following are true about cycles?

• A cycle is a sequence of events that repeats.
• Can take place over relatively short periods.
• Can take place over millions of years.
• All of the above

What is the water cycle?

• The continuous circulation of water through the exosphere.
• The continuous circulation of water through the lithosphere.
• The continuous circulation of water through the hydrosphere.
• The continuous circulation of water through the atmosphere.

What happens to water vapor as it rises into the atmosphere?

• It melts and turns into liquid water.
• It cools and condenses to form clouds.
• It evaporates and disappears.
• It stays in the air as water vapor.

What is the process by which plants “breathe out” water vapor?

• Transpiration
• Evaporation
• Condensation
• Runoff

How is water stored in the ground?

• It remains as water vapor in the air.
• It is stored in the small spaces between particles of soil, sand, and rock as groundwater.
• It is absorbed by plants and trees.
• It flows back into the ocean.

What is the carbon cycle?

• A biogeochemical cycle involving the element carbon.
• The process of converting carbon dioxide into oxygen.
• The movement of carbon atoms through the Earth's system.
• The process of storing carbon in the ocean.

How is carbon removed from the atmosphere?

• Humans and animals breathe it out.
• Trees burn and release carbon.
• Phytoplankton undergo photosynthesis.
• Carbon is dissolved by ocean waves.

What is a carbon sink?

• A place that removes carbon from the atmosphere.
• The process of converting carbon dioxide into shells.
• A storage area for carbon, such as the ocean.
• The decomposition process that changes carbon compounds.

True or false: Carbon, like water, is never destroyed; it is only changed from one form to another.

• True
• False

True or false: The amount of energy that enters the system should equal the amount that is removed.

• True
• False