Hydrology

About how much of the Earth's surface is covered with water?

• 1/4
• 1/2
• 3/4
• 1/5

The supply of freshwater under the Earth's surface.

• watershed
• mouth
• headwaters
• groundwater

Where is most of the freshwater found on Earth?

• lakes
• glaciers
• oceans
• rivers

Which source of freshwater is not easily available for human use?

• oceans
• freshwater lakes
• rivers
• icecaps/glaciers

The change of water from a liquid to a gas.

• evaporation
• precipitation
• condensation
• transpiration

Any type of moisture that falls to the Earth.

• evaporation
• precipitation
• condensation
• transpiration

The release of moisture by living plants.

• evaporation
• precipitation
• condensation
• transpiration

What is A?

• Evaporation
• Condensation
• Precipitation
• Runoff

What is B?

• Evaporation
• Condensation
• Precipitation
• Runoff

Which represents the distribution of water on Earth?

• 3% freshwater, 97% salt water
• 97% freshwater, 3% salt water
• 71% freshwater, 29% salt water
• 29% freshwater, 71% salt water