Water cycle

What percentage of Earth's water is fresh water, and where is the majority of it stored?

• 97%; oceans

• 3%; polar ice caps, snowpacks, and glaciers

• 3%; rivers and lakes

• 70%; underground aquifers

In how many states does water exist on Earth?

• One

• Two

• Three

• Four

Which factors influence the rate of evaporation at the ocean surface?

• Ocean depth and salinity

• Sea surface temperature, surface winds, and air temperature

• Lunar phases and ocean currents

• Atmospheric pressure and cloud cover

What is the primary role of water vapor in Earth's climate?

• It causes ocean currents.

• It is the primary greenhouse gas.

• It forms ice caps.

• It creates wind patterns.

Where is water that falls on the land surface as precipitation primarily stored?

• Only in rivers and streams

• In the atmosphere as clouds

• Within snowpacks, lakes, reservoirs, soils, and underground aquifers

• Directly in the ocean