Streams and Rivers

The organisms found in rivers and streams vary based on location.

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T

Which area of rivers and streams will most likely contain the most sediment?
a.
the source
b.
the mouth
c.
the middle portion
d.
none of the above

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B

What characteristic sets streams and rivers apart?
a.
water quality
b.
direction of flow
c.
size
d.
biodiversity

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C

How does current affect biodiversity in rivers and streams?
a.
It prevents bacteria and algae from living in rivers and streams.
b.
It causes a decrease in biodiversity by preventing organisms from remaining in rivers and streams.
c.
It mixes the nutrients for plant and animal use and determines location of organisms.
d.
It has no affect on biodiversity.

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C

How does access to sunlight affect the biodiversity of a river ecosystem?
a.
Sediment is limited in areas with little access to sunlight.
b.
Plant and animal life is limited in areas with little access to sunlight.
c.
Algae is more common in areas with less access to sunlight.
d.
Biodiversity is unaffected by access to sunlight.

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B

Sewage is the most common form of pollution in rivers and streams.

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T

Where does the water in streams and rivers originate?
a.
precipitation
b.
runoff
c.
ice and snowpacks
d.
all of the above

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D

Which of the following is a way that humans impact rivers and streams?
a.
pollution
b.
dams
c.
flooding
d.
all of the above

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D

Streams have a detectable current, while rivers do not.

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F

Currents shape rivers over long periods of time.

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T