Unit Test — Unit test Answers

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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.

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