Changing Waterways Answers

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Explain how thermohaline circulation is influenced by salinity and temperature.

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Thermohaline circulation _______.

supplies heat to polar regions

causes salt lake formation

causes oxbow lake formation

is unaffected by heat fluctuations

Buffer zones _______.

can help regulate the acidity of aquatic ecosystems

help increase erosion rates

are set up around natural resource areas

all of the above

How can buffer strips have a positive impact on waterways?

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Explain how flooding affects rivers and how flooding can be influenced by human activity.

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How can alternative practices reduce human impact on waterways?

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Ocean and freshwater contamination _______.

does not affect marine life

is not affected by agriculture

results from industrial activity

is independent of human activity

Explain how pollution affects marine life.

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Which of the following is not an effect of erosion on lakes?

water leakage

wearing away of sides

increased water levels

basin filling with sediment

Which of the following statements about the effects of pollution on marine ecosystems is true?

Burning fossil fuels causes a direct increase in the temperatures of ocean water.

Burning fossil fuels causes a decrease in the pH of ocean water making it more acidic.

Pollution in marine ecosystems causes a decrease in the formation of algal blooms.

Addition of warm water has no effect on marine ecosystems.

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