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Hydrology (Earth's Waters)
Test Description: All questions coincide with North Carolina Standard 8.E.1
Instructions: Answer all questions to get your test result.
1) Over the last million years, what has happened to the total amount of water on earth?
A
Decreased
B
Increased
C
Risen and then fallen
D
Stayed relatively the same
2) Why is water called a universial solvent?
A
It exists in three different states.
B
It moves easily through tiny pores in materials.
C
It dissolves many different substances.
D
It dissolves into many other substances.
3) An increase in which characteristic most likely indicates that sewage is in a stream?
A
Nitrate
B
Density
C
Temperature
D
pH
4) Why should oceans be protected?
A
Serve as international borders
B
Provide important trade routes
C
Oceans serve as an important salt reservoir
D
Provide food and oxygen
5) What causes water molecules to stick to each other?
A
Cohesion
B
Polarity
C
Adhesion
D
Density
6) What would best allow an oceanographer to study the deep ocean?
A
Satellite data
B
Scuba gear
C
Seismograph
D
Submersible
7) Upwelling is the rise of cold water from the depths of the oceans. Which statement best describes the importance of upwelling?
A
The waves created by the rising water is good for surfing.
B
The rising cold water mixes with warm water and keeps the Earth from freezing.
C
The currents created by the rising water interact with wind belts to form global winds.
D
The nutrients and minerals in the rising water support a diverse population of ocean creatures.
8) What would most likely cause an increase in a stream’s turbidity level?
A
Dissolved minerals
B
Acid rain
C
High bacterial levels
D
Erosion
9) What is one method of conserving water?
A
Brushing teeth with the water running
B
Channeling water through an open ditch to irrigate fields
C
Watering yards during the middle of the day
D
Reusing water in a factory to cool overheated machines
10) During the eutrophication of a lake, fertilizers increase the nutrient levels in the water. What best describes how the excess nutrients affect the lake?
A
Dissolved oxygen rises; algae increases; fish population increases.
B
Temperature drops; plants increase; populations increase
C
pH drops; plants die; fish die
D
Overproduction of algae; dissolved oxygen drops; fish die
11) What characteristic explains why water has many unusual properties?
A
Water is a non-polar molecule
B
Water molecules do not form solids
C
Water molecules do not have electrically charged areas
D
Water is a polar molecule
12) Why is chlorine added during the water treatment process?
A
It increases the turbidity level
B
To kill harmful microorganisms
C
To aid in filtering the solids
D
To reduce odors
13) What is the most likely reason it is illegal to dump chemicals into the soil?
A
Chemicals cause insect populations to grow
B
Chemicals contaminate groundwater
C
Chemicals fertilize the ground
D
Chemicals catch on fire
14) Why are most lakes freshwater?
A
The rivers that fill most lakes do not contain any salt.
B
Most lakes have an outlet through which salt flows downstream.
C
In most lakes organisms absorb any salt present.
D
Salt sinks to the bottom of most lakes.
15) What will most likely happen to a full bottle of water when it is place in the freezer?
A
The water will stick to itself.
B
The water will expand and crack the bottle.
C
The water will shrink and collapse the bottle.
D
The water and bottle will remain the same.
16) Which statement most accurately describes the water cycle?
A
Oceans stay about the same level because not enough water evaporates to affect water levels.
B
Oceans will someday dry up due to evaporation.
C
Oceans become larger every year due to precipitation.
D
Oceans stay about the same level because water that evaporates returns as precipitation.
17) Why do tributaries merge to form the Cape Fear River?
A
Depth of the water
B
Speed of the water
C
Slope of the land
D
Length of the streams
18) Runoff from hog farms on the Coastal Plains works its way into the Cape Fear watershed. Where is this polluted runoff most likely filtered?
A
Cape Fear Estuary
B
Cape Fear River
C
Local streams
D
Waste ponds
19) What is the difference between point and non point sources of pollution?
A
Point source kills organisms and non point does not.
B
The exact cause of point source pollution can be identified.
C
The exact cause of non point source pollution can be identified.
D
Non point source pollution kills organisms and point source pollution does not.
20) What makes up the majority of surface level fresh water on Earth?
A
Lakes
B
Rivers and streams
C
Oceans
D
Glacier and ice caps
*select an answer for all questions
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