Aquatic Biome Review

What is the main difference between freshwater and marine ecosystems?

• Temperature

• Depth

• Salinity

• Light availability

What effect does adding salt to water have on its freezing and boiling points?

• Decreases both freezing and boiling points

• Increases both freezing and boiling points

• Decreases freezing point and increases boiling point

• Increases freezing point and decreases boiling point

What percentage of Earth's water is freshwater?

• 1%

• 3%

• 5%

• 10%

Where does tap water mostly come from?

• Groundwater

• Rainwater

• Surface water

• Desalinated water

What does a higher WQI number indicate about water quality?

• The water is cleaner

• The water is dirtier

• The water is colder

• The water is harder

Which of the following is NOT a parameter used to determine the WQI?

• pH

• Turbidity

• Color

• Temperature

What happens to water as the amount of suspended solids increases?

• The water becomes clearer

• The water becomes more turbid

• The water temperature decreases

• The water pH level increases

What is one effect of low turbidity in water?

• Less photosynthesis occurs

• More photosynthesis occurs

• The water becomes warmer

• The water becomes more acidic

What is the range of DO most aquatic organisms need to survive?

• 1 ppm - 3 ppm

• 3 ppm - 5 ppm

• 5 ppm - 7 ppm

• 7 ppm - 9 ppm

How does high temperature affect DO levels in water?

• Increases DO

• Decreases DO

• No effect on DO

• Stabilizes DO