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Hydrosphere
Test Description: This is review for NC 8th Grade Science Hydrosphere
Instructions: Answer all questions to get your test result.
1) Where is most of Earth's water located?
A
Lakes
B
Glaciers
C
Rivers
D
Oceans
2) An area of land where all of the water drains into a lake or river is called:
A
a habitat
B
a wetland
C
an ecosystem
D
a watershed
3) Most of the freshwater on Earth is located here:
A
in rivers, streams, and lakes
B
under the ground
C
in the oceans
D
in polar ice caps and glaciers
4) Which of the following is a characteristic of an estuary?
A
an area where freshwater mixes with salt water
B
an area that is protected by land on both sides
C
an area fed by several rivers
D
an area that many watersheds drain into
5) A layer of rock that collects and stores water is called
A
an estuary
B
an aquifer
C
a glacier
D
a hydrosphere
6) An example of nonpoint source pollution is:
A
chemicals being released from an industrial factory
B
oil leaking from a tanker
C
fertilizer runoff from a golf course
D
wastewater from a leaking pipe
7) An obvious example of point source pollution is:
A
trash floating in a lake
B
oil spilling from a tanker
C
gas and oil from the roadways
D
runoff from farms
8) What can high nitrate and phosphate levels lead to in a water system?
A
algal blooms
B
healthier fish
C
hotter water
D
less algae
9) Which of the following contains nitrates and phosphates?
A
fertilizers
B
radiation
C
salts
D
pH
10) What happens when bacteria decompose algae in an algal bloom?
A
decomposers at the surface remove oxygen from the air
B
decomposers add oxygen to the water
C
decomposers add oxygen to the air
D
decomposers remove oxygen from the water
*select an answer for all questions
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