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					CRCT Review 1

  Earth Science
1. It is about 28 days from one full
moon to the next. This is because 28
days is about the time it takes for one

A. revolution of the Moon around
B. revolution of Earth around the
C. rotation of the Sun.
D. rotation of Earth.
2. Which contains the greatest
amount of Earth's freshwater?

A. groundwater
B. oceans and seas
C. lakes and rivers
D. glaciers and polar ice cap
3. London is much farther north than Chicago,
yet it is warmer in London in the winter than it is
in Chicago. Why is this true?

A. Waters around England are warmed by
many underwater volcanoes.
B. London receives more sunshine in the winter
than other places farther south.
C. London's climate is affected by warm ocean
currents that flow from the south.
D. The Sun's rays shine at a higher angle in
London than in Chicago.
4. Sunlight is not currently used as a major source of
energy. Why not?

A. Not enough sunlight reaches Earth to meet our
energy needs.
B. Economical ways to capture and store large
amounts of solar energy have not been developed.
C. Using sunlight for power will keep plants and
animals from getting the energy they need.
D. Our reserves of gas and oil will last for several
hundred years so there is no need to change to solar
5. What characteristics do scientists
measure to determine the temperature
and composition of stars?

A. the positions of the stars in the
B. the light radiated from the stars
C. the proximity of the stars to each
D. the speed at which stars are
Which position of the Moon could
    cause a solar eclipse?
 A. 1      B. 2     C. 3 D. 4
7. Most modern cities obtain their
drinking water from

A. surface reservoirs.
B. rivers and streams.
C. underground reservoirs.
D. desalinated ocean water.
8. Which is the best indication of an
approaching storm?

A. a sudden increase in wind speed
B. a decrease in barometric pressure
C. a clearing sky after a cold front
D. a sudden drop in the humidity
9. In the morning, Mary noticed there
was dew on the grass. In the
afternoon, the grass was dry. What
most likely happened to the water?

A. It went into the ground.
B. It went into the air.
C. It formed clouds.
D. It no longer exists.
10. Extrusive rocks have small
grains because they —
A. cool quickly.

B. harden underground.

C. contain rare minerals.

D. have a rough mixture.
11. How would the measurable properties
of a golf ball change if it were moved from
Earth to the Moon?

A. It would have the same mass, but a
different weight.
B. It would have the same weight, but a
different mass.
C. It would have the same density, but a
different mass.
D. It would have the same mass, but a
different density.
12. A hurricane-type cloud known
as the Great Red Spot can be
found on which planet?

A. Saturn
B. Mars
C. Uranus
D. Jupiter
13. Most water vapor in the
atmosphere comes from

A. evaporation from oceans.
B. evaporation from soil.
C. transpiration from plants.
D. the burning of fossil fuels.
14. Which is a result of the tilt of
Earth's axis?

A. days
B. months
C. years
D. seasons
     15. The pictures show different
     stages in the development of a
       river valley. Which picture
         shows the first stage of
A.         B.      C.         D.
16. Which natural force creates
surface ocean currents?

A. gravity
B. sunlight
C. earthquakes
D. wind
17. If you were to watch the stars all night,
they would seem to

A. stay in exactly the same place in the
B. move across the sky at night, as the
Sun does during the day.
C. go in circles around the point straight
up from where you are.
D. move across the sky at night, in the
opposite direction that the Sun moves
during the day.
18. Why does the Moon orbit Earth
instead of the Sun?

A. Gravity depends on distance and the
Moon is closer to Earth.
B. Only large objects orbit around the Sun
and the Moon is too small.
C. The Moon used to be part of Earth so it
must orbit Earth.
D. The Moon is moving too fast and
cannot change its orbit.
19. Most earthquakes are caused

A. the tilting of Earth's axis.
B. underground water erosion.
C. pressures from within Earth.
D. the Moon's gravitational pull.
20. Imagine you are an
astronomer who just observed a
huge burst of light from an
exploding star. What did you
most likely observe?

A. a pulsar
B. a black hole
C. a supernova
D. a meteor
    This landform was
    probably caused by —

• A. high tides.
    B. wind.
    C. human activity.
    D. running water.
• The diagram shows layers of
  sedimentary rocks and
  examples of their fossils.
  Which layer contains the
  oldest fossils?

• A. 1
  B. 2
  C. 3
  D. 4
23. Humus, silt, clay, and sand
are all parts of —

A. soil.
B. fungi.
C. rocks.
D. plants.
24. The density is highest in

A. crust.
B. upper mantle.
C. lower mantle.
D. core.
25. 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 of the
water vapor in it condenses.

Which of the following will most likely
form as this occurs?

A. a cloud
B. a rainbow
C. a sunset
D. a tornado

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