AnswersAZ-Earth and Space Science A SC301Unit Test

Unit Test — Unit test Answers

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21
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What can be observed only by observing its effects on gravity?

A
dark matter
B
a solar nebula
C
gas and dust
D
a planetesimal
22
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Which characteristic is common to all inner planets?

A
rings
B
moons
C
rocky surfaces
D
slow revolutions
23

When two objects are near each other, how would increasing one object’s mass affect it?

A
The shape of the object would change.
B
The weight of the object would decrease.
C
The gravitational force of the object would increase.
D
The mass of the object would be stronger than gravity.
24

Which technology can observe electromagnetic radiation and avoid light pollution to allow for exploration beyond our solar system?

A
space probe
B
space station
C
space shuttle
D
space observatory
25

At which location would an object’s weight be the greatest?

A
on Pluto
B
on Earth
C
on the Sun
D
on the moon
26

Which type of galaxy has arms that contain sites of active star formation and start close to a bulge in the center?

A
elliptical
B
irregular
C
barred spiral
D
normal spiral
27

What will a medium-mass star become at the very end of its life cycle?

A
a red giant
B
a black hole
C
a black dwarf
D
a neutron star
28

In what way has technology used aboard the International Space Station benefited humans back on Earth?

A
Robotic arms used aboard the ISS are now used in delicate surgeries on Earth.
B
Air purifiers developed for the ISS now provide cleaner air for humans on Earth.
C
Software created for the ISS was adapted and is now used to conduct brain surgery on Earth.
D
Research conducted on the ISS crew about heart disease is now used to help patients on Earth.
29

What is released through nuclear fusion in stars?

A
energy
B
gas
C
mass
D
pressure
30

Which phrase describes the composition of the outer planets?

A
are gaseous
B
contain water
C
have high densities
D
are made mostly of liquid

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