The Water Cycle
Distribution of Earth's Water
Surface Water
Groundwater
Exploring the Ocean
100

The continuous process by which water moves from Earth's surface to the atmosphere and back again.

What is the water cycle?

100

Most of Earth's _______ _______ is frozen as snow and ice.

Fresh water.

100

A trickle of water that originates from a source like an underground stream, runoff from rain, or melting snow or ice.

What is a river?

100

Water that fills cracks and spaces in soil and rock layers.

What is groundwater?

100

The total amount of dissolved salts in a sample of water.

What is salinity?

200

The process by which molecules at the surface of a liquid absorb enough energy to change into a gas.

What is evaporation?

200

A small amount of precipitation that remains on Earth's surface and runs off into streams and rives.

What is runoff?

200

The land area that supplies water to a river system.

What is a watershed?

200

The upper layer of the saturated zone.

What is the water table?

200

Interferes with the formation of ice.

What is salt?

300

Water vapor given off through leaves.

What is transpiration?

300

A series of actions or operations leading toward a particular result. 

What is a process?

300

Ridges of land that separate watersheds.

What are divides?
300

Layers of rock that hold water below the saturated zone.

What are aquifers?

300

Has a higher density than fresh water.

What is salt water?

400

The process by which water vapor becomes liquid water.

What is condensation?

400

Largest ocean covering  an area greater than all the land on Earth.

What is the Pacific Ocean?

400

Form when water collects in hollows and low-lying areas of land.

What are ponds and lakes?

400

A hole sunk into the earth to reach a supply of water.

What is a well?

400

Drop as you move further away from the equator.

What are water temperatures?

500

Water that forms in clouds and falls to earth as rain, sleet or snow.

What is precipitation?

500

Smaller saltwater bodies that generally inland and landlocked. 

What are seas?

500

A storage space for water.

What is a reservior?

500

The entire area below the water table.

What is groundwater?

500

The force exerted by the weight of water.

What is water pressure?