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Science 6th Grade Review Benchmark
Test Description: Benchmark review
Instructions: Answer all questions to get your test result.
1) Approximately 9907% of all water on Earth is found in oceans, seas, ice, and the atmosphere. Based on this information, which statement is most accurate
A
The water cycle returns all usable water to the sea
B
Less than 0.3% of Earth's water is drinkable
C
Humans are not dependent on ocean water
D
The Earth's freshwater supply is infinite.
2) How much of the Earth is covered in water?
A
50%
B
30%
C
90%
D
70%
3) Where is most of the Earth's fresh water found?
A
rivers
B
lakes
C
glaciers
D
streams
4) When dense, cold air pushes beneath warmer atmospheric air, the lighter, warmer air rises. As this air rises into the atmosphere, it cools and some water vapor in it condenses. Which of the following will most likely form as this occurs?
A
a rainbow
B
a tornado
C
a sunset
D
a cloud
5) The Energy source that powers the Earth's water cycle
A
heat from the sun
B
Earth's rotation
C
radiation from Earth's core
D
the Sun's gravity
6) In order for precipitation to occur on Earth, water from oceans, lakes, and rivers must
A
freeze
B
condense
C
evaporate
D
expand
7) Ocean water differs from freshwater in that it has
A
a lower temperature
B
a higher concentration of sodium chloride
C
a higher temperature
D
a higher concentration of silicon dioxide
8) When the sea floor spreads apart, volcanoes and ridges are formed because
A
sediments are deposited where the floor spreads, building ridges
B
ocean water pushes down on the surrounding sea floor, pushing ridges up
C
underwater earthquakes lift the sea floor into long ridges
D
as the plates pull apart, magma moves to the surface, building ridges
9) What technology is used to measure the depth of the ocean?
A
telescopes
B
submarines
C
radar
D
sonar
10) Which of these increases as a submarine dives deeper into the ocean?
A
the number of plants in the water
B
the water temperature
C
the water pressure
D
the freshness of the water
11) Which natural force creates surface ocean currents?
A
gravity
B
earthquakes
C
sunlight
D
wind
12) Which of these has the most influence on ocean tides?
A
radiation from the sun
B
the magnetic field of the Earth
C
electrical forces in the atmosphere
D
gravity between the Earth and the moon
13) The ocean water near the equator absorbs more heat throughout the year than ocean water near the North Pole. Which of the following best explains this difference?
A
The equator receives more direct sunlight.
B
The equator rotates more quickly on Earth's axis.
C
The equator is closer to the sun.
D
The equator has higher sea levels.
14) An air mass gets its temperature and humidity from
A
speeds up evaporation following precipitation
B
the land or water over which it forms
C
is a determining factor of major air movements
D
changes in the upper atmosphere
15) Cold air is more dense than warm air. When a cold air mass moves into a warm air mass, causing a cold front, the warm air mass is
A
forced backward, as the approaching cold air replaces it
B
compressed into a smaller mass, as it becomes even warmer
C
forced upward, where its water vapor condenses
D
squeezed downward, causing clouds and rain
16) Water in Earth's atmosphere comes mainly from
A
tropical rain forests
B
the oceans
C
underground rivers
D
glaciers
17) Hurricanes continue to grow and move as long as they continue to be
A
pushed along by wind currents
B
over cool ocean water
C
over warm ocean water
D
pushed along by water currents
18) A rock that contains a metal is known as
A
an ore
B
a stalactite
C
a crystal
D
a stalagmite
19) What type of material would you expect to find in the inner core of the Earth?
A
solid rock composed of mostly iron and nickel
B
liquid
*select an answer for all questions
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