Unit Test — Cumulative exam Answers

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1
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Which part of the shallow ocean descends sharply away from the continental shelf?

A
abyssal plain
B
mid-ocean ridge
C
transitional zone
D
continental slope
2
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Which correctly lists the three methods of heat transfer?

A
absorption, conduction, convection
B
conduction, convection, radiation
C
convection, absorption, reflection
D
radiation, conduction, reflection
3

Lori attended a lecture about the Sun, and the presenter had placed this image on the wall. Which layer of the Sun could this image be referring to?

Question illustration
A
the convection zone, because it shows how energy moves in a convection current
B
the radiation zone, because it shows how energy is transferred through radiation
C
the core, because it shows how the Sun creates energy through the process of nuclear fusion
D
the chromosphere, because it shows how energy is emitted by the atmosphere of the Sun
4

About how old is the Sun?

A
1.2 billion years
B
4.6 billion years
C
6.4 billion years
D
8.2 billion years
7

Why is the unsaturated zone not filled with water?

A
It is below the water table and water stays above it.
B
It is clay and water pools above it.
C
It is granite and water flows around it.
D
It is permeable and water flows through it.
8

Where are jet streams found?

c
close to the poles
i
in the middle latitude
t
toward the equator
i
in the upper atmosphere
9

Which statement correctly describes terrestrial planets?

A
They are made of mostly rock.
B
They are made of gases.
C
They are small objects of ice and dust.
D
They are very large compared to other planets.
11

In which direction does Earth rotate?

A
eastward around its axis
B
in an ellipse around the Sun
C
counterclockwise around the Sun
D
from north to south around its axis
13

In which direction does wave energy travel in the ocean?

A
up and down
B
north and south
C
with the currents
D
toward the shore
14

Which correctly list the three gases that each make up less than 1 percent of Earth’s atmosphere?

A
argon, water vapor, carbon dioxide
B
oxygen, argon, water vapor
C
nitrogen, oxygen, carbon dioxide
D
carbon dioxide, oxygen, argon
15

Which type of star will become a black hole when it dies?

a
a protostar
a
a supergiant
a
a white dwarf
a
a red dwarf
17

What percentage of light hits Earth’s surface directly?

A
3 percent
B
5 percent
C
31 percent
D
47 percent
19

Which statement accurately describes the relationship between air pressure, air density, or altitude?

A
As altitude increases, pressure increases.
B
As altitude increases, air density increases.
C
Air pressure and density are lowest at sea level.
D
Denser air exerts more pressure than less dense air.
20

Which is one physical property that all stars have?

A
They are made of gases.
B
They shine very brightly.
C
They have a triangle shape.
D
They contain iron in their cores.

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