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