Star Systems and Galaxies Answers

0 verified answers1 views
1
Free Preview

Which event led to the formation of our solar system?

A
A galaxy broke apart.
B
A massive star exploded.
C
A solar nebula collapsed.
D
Dark matter materialized.
2
Free Preview

Which two objects in space formed from the huge disk of ice and debris beyond the outer planets?

A
Pluto and comets
B
comets and Neptune
C
Neptune and a solar nebula
D
a solar nebula and planetesimals
3

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.
4

Which discovery by astronomer Vera Rubin helped prove the existence of dark matter?

A
Galaxies exist outside of the Milky Way.
B
The expansion of the universe is accelerating.
C
Galaxies spin faster than they should, based on their visible matter.
D
Gas giants form farther from the Sun, where temperatures are cooler.
6

What would most likely cause the future acceleration of the expansion of the universe?

A
radiation from the Sun
B
the existence of background radiation
C
the continued existence of dark energy
D
light shifts identified by the Doppler effect
7

What happens in the process of gravitational condensation?

A
An object decreases in size due to the collision of materials.
B
An object increases in size due to the addition of materials.
C
Gas particles are formed from solar nebula materials.
D
Solid particles are formed from solar nebula materials.
8

Which correctly lists the two elements that make up the empty space in the universe?

A
ice and debris
B
debris and dark matter
C
dark matter and dark energy
D
dark energy and dust
9

Which statement accurately describes the outer planets?

A
Pluto is one of the outer planets.
B
The outer planets are also called rocky planets.
C
The outer planets have thin atmospheres.
D
The outer planets have a high gravity due to their large size.
10

About how long ago did our solar system start to form?

A
About 5 million years ago
B
About 14 million years ago
C
About 5 billion years ago
D
About 14 billion years ago

Did you find these answers helpful?