Streams and Rivers Answers

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Which of the following is a way that humans impact rivers and streams?

pollution

dams

flooding

all of the above

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What characteristic sets streams and rivers apart?

water quality

direction of flow

size

biodiversity

How does current affect biodiversity in rivers and streams?

It prevents bacteria and algae from living in rivers and streams.

It causes a decrease in biodiversity by preventing organisms from remaining in rivers and streams.

It mixes the nutrients for plant and animal use and determines location of organisms.

It has no affect on biodiversity.

How does access to sunlight affect the biodiversity of a river ecosystem?

Sediment is limited in areas with little access to sunlight.

Plant and animal life is limited in areas with little access to sunlight.

Algae is more common in areas with less access to sunlight.

Biodiversity is unaffected by access to sunlight.

Streams have a detectable current, while rivers do not.

Fish that feed on sediment will most likely be found in _______ rivers.

shallow

narrow

deep

fast-moving

Dams have a limited effect on rivers and streams.

Rivers are more important to the water cycle than streams.

Where does the water in streams and rivers originate?

precipitation

runoff

ice and snowpacks

all of the above

How has the removal of wetlands impacted rivers and streams?

It has increased the rate of absorption, causing a decrease in water levels.

It has decreased the rate of absorption, causing greater incidents of flooding.

It has hindered the migration of fish, causing a loss in biodiversity.

Wetland removal has had no measurable impact on rivers and streams.

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