Hydrosphere Notes Check_Block 1

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

• 3%
• 23%
• 77%
• 97%

Why must humans clean water before using it? 

• Humans are unable to digest untreated river water
• River water is free of any contaminant or pollutants
• Untreated river water is brown and humans prefer clear water
• Clear water may contain contaminants that could harm humans
  

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

Which describes an estuary?

• A large body of fresh water.
• A large body of salt water.
• The wide, lower course of a river where fresh and salt water mix.

Where does most fresh water exist?

• ice caps, lakes, and streams
• glaciers, rivers, and oceans
• aquifers, ice caps, and glaciers

An area of land that drains into a body of water.

• mouth
• point-source pollution
• watershed
• headwaters

How much of the earth's water is freshwater?

• 50 %
• 3 %
• 97 %
• 93 %

All the water on, in , and surrounding the earth

• Atmosphere
• Hydrosphere
• Biosphere
• Lithosphere

Trees and plants releasing water vapor into the air is called

• Transpiration
• Precipitation
• Evaporation
• Condensation