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Astronomy & Earth Movements Mid-Term

Multiple Choice
Identify the choice that best completes the statement or answers the question.
 

 1. 

How can you tell that Mercury is not a gas giant?
a.
because of where it orbits the sun
c.
because it is dense and rocky
b.
because it has no ring system
d.
because it has only one moon
 

 2. 

Which of the following statements is true?
a.
The universe is expanding outward.
b.
The universe is getting smaller every day.
c.
The universe contracts and expands on a regular basis.
d.
Scientists do not know if the universe is getting larger or smaller.
 

 3. 

To which of the two main groups of planets does Earth belong?
a.
the outer planets
c.
the terrestrial planets
b.
the gas giants
d.
the interior planets
 

 4. 

What holds a galaxy together?
a.
stars
c.
brightness
b.
gravity
d.
dust
 

 5. 

According to the big bang theory, the universe is about
a.
200 billion years old.
c.
4.5 billion years old.
b.
700 billion years old.
d.
13.7 billion years old.
 

 6. 

Which of the following is the largest?
a.
a solar system
c.
a star
b.
a galaxy
d.
a planet
 

 7. 

Which is the next planet moving outward from the sun after Saturn?
a.
Neptune
c.
Jupiter
b.
Uranus
d.
Venus
 

 8. 

Why is Venus the hottest planet?
a.
it has no atmosphere.
b.
The planet’s fast period of rotation.
c.
The planet’s retrograde spin on its axis.
d.
The greenhouse effect of its atmosphere.
 

 9. 

The length of a year on Earth is determined by Earth's
a.
rotation.
c.
revolution.
b.
axis tilt.
d.
gravitational pull.
 

 10. 

How often do tides rise and fall?
a.
once a day
c.
every 14 days
b.
about every 6 hours
d.
every 24 h, 50 m
 

 11. 

Which is a result of the tilt of Earth's axis?
a.
months
c.
days
b.
seasons
d.
years
 

 12. 

Why does it get dark at night?
a.
the Moon comes between the Earth and Sun
c.
our side of the Earth rotates away from the Sun
b.
the Sun goes behind the Earth
 

 13. 

Summer occurs on the hemisphere of Earth that is ____.
a.
tilted toward the Sun
c.
tilted away from the Sun
b.
turned toward the Sun
d.
turned away from the Sun
 

 14. 

Each year, Earth moves once around
a.
Mars.
c.
Venus.
b.
the Moon.
d.
the Sun.
 

 15. 

What causes day and night?
a.
the Earth’s revolution
c.
the Earth’s orbit
b.
the Earth’s rotation
d.
the Moon’s orbit
 

 16. 

What is true about our galaxy?
a.
it is an elliptical galaxy
c.
it is an irregular galaxy
b.
it is the Milky Way
d.
it is a dwarf galaxy
 

 17. 

Who used his telescope to prove that the Sun was in the center of the solar system?
a.
Ptolemy
c.
Copernicus
b.
Galileo
d.
Aristotle
 

 18. 

Which planet is the fourth from the Sun?
a.
Earth
c.
Mars
b.
Mercury
d.
Jupiter
 

 19. 

The model of the solar system that has the Earth in the center is the
a.
Galilean model
c.
the heliocentric model
b.
the geocentric model
d.
the Ptolemic Model
 

 20. 

Which object in our Solar System contains over 99% of the total mass?
a.
the 8 planets
c.
the Kuiper Belt
b.
the asteroid belt
d.
the Sun
 



 
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