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