Water Cycle & Hydrosphere

Why is MOST of the freshwater on Earth not available for our use?

• All freshwater on Earth is easily accessible for use.
• It is frozen in the icecaps and glaciers.
• It is surface water.
• It is underground.

How much of Earth's water is unavailable for humans to consume due to its high salinity? 

• 3%
• 23%
• 77%
• 97%

How does the amount of water circulating in the water cycle change?

• The amount of water remains constant
• The amount of water increases each time it rains
• he amount of water decreases and then increases each day
• The amount of water decreases every time evaporation occurs

Which statement best describes how estuaries are positive environment for animals and plants

• They flood regularly destroying organisms' habitat

• They provide a safe hatchery full of nutrients and food

• They dry up each summer stranding organisms in shallow water

• hold high numbers of predators to feed off young organisms

Snow, sleet, hail, and rain are all examples of  ________________. 

• evaporation
• condensation
• accumulation
• precipitation

What is it called when plants give off water vapor as a waste product?

• condensation
• evaporation
• sublimation
• transpiration

During which stage do clouds form?

• condensation
• evaporation
• precipitation

When water falls on land and gets absorbed by the ground.

• Evaporation

• Transpiration

• Infiltration

• Consternation

A semi-enclosed area where fresh water from a river meets salty water from the ocean.

• watershed

• groundwater

• ocean

• estuary

What do we call the land area that supplies water to a river system?

• runoff
• recharge
• watershed
• valley