Unit Test — Unit test Answers

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Which statement accurately describes the inner planets?

A
Uranus is one of the inner planets.
B
The inner planets formed when the solar system cooled.
C
The inner planets are also called terrestrial planets.
D
The inner planets are larger than the outer planets.
22
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Which statement accurately describes planetesimals?

A
They are the origins of planets.
B
They formed from ice and rocks.
C
They were created during the big bang.
D
They contain 98% of matter in the solar system.
23

How did Kepler’s discoveries contribute to astronomy?

A
They supported the heliocentric model.
B
They established the laws of planetary motion.
C
They explained how the Sun rises and sets.
D
They made astronomy accessible to people who spoke Italian.
24

Which shows the correct order of events during the process of nucleosynthesis?

A
hydrogen nucleus formed, isotope of hydrogen, tritium formed, helium nucleus formed
B
helium nucleus formed, hydrogen nucleus formed, isotope of hydrogen, tritium formed
C
hydrogen nucleus formed, helium nucleus formed, isotope of hydrogen, tritium formed
D
helium nucleus formed, isotope of hydrogen, tritium formed, hydrogen nucleus formed
25

Which quantities decrease as the distance between a planet and the Sun increases? Check all that apply.

A
tangential speed
B
mass
C
gravitational force
D
area swept out in a day
E
distance traveled in a day

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Unit Test — Unit test Answers — CMS Summer 2026…