Hydrosphere Study Guide

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.

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All the water on, in , and surrounding the earth

• Atmosphere

• Hydrosphere

• Biosphere

• Lithosphere

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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
  

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The Florida Everglades is a large, warm wetland with many plants, animals, and microscopic organisms. Which part of the Earth system includes the water in the Everglades?

• the geosphere

• the cryosphere

• the atmosphere

• the hydrosphere

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Which will cause an increase in runoff and infiltration in an area?

• contouring farmland

• a drought

• digging wells

• excessive rain

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What is the role of oceans as a water source?

• Oceans are too salty to be used as a water source

• Oceans serve as a primary source of water for human consumption and various activities.

• Oceans only provide water for marine life

• Oceans are not a significant source of water

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Approximately how much of Earth's water is freshwater?

• 97%

• 71%

• 25%

• 3%

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Which technological tool uses a sound echo to measure distance?

• sonar 

• submarine 

• ocean buoy

• robotic probe

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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

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