Ch. 14 Review (Environmental Science)

How much of Earth's water is freshwater?

• 2.5%

• 97.5%

• 10%

How much of our freshwater is available for drinking and growing food?

• 79%

• 21%

• 97.5%

How do we access groundwater?

• Natural springs

• Geysers

• Wells

Is every waterway part of a watershed?

• Yes

• No

What is the most common way we access groundwater?

• Natural springs

• Wells

• Geysers

How is most freshwater used?

• Personal

• Industry

• Agriculture

Bodies of water with a high nutrient content lead to eutrophication which leads to a low oxygen level

• nutrient pollution

• toxic chemical pollution

• sediment pollution

Freshwater pollution from runoff, includes petroleum and petroleum products, BPA, pesticides, and detergents

• sediment pollution

• toxic chemical pollution

• thermal pollution

Results from erosion and degrades water quality

• thermal pollution

• biological pollution

• sediment pollution

warmer water = lower oxygen levels

occurs when industries empty warm wastewater back into a body of water which increases the overall temperature

• thermal pollution

• biological pollution

• nutrient pollution