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Earth/moon/sun#1
Test Description: Review of the positions of the earth moon and sun
Instructions: Answer all questions to get your test result.
1) Summarize why life is possible on the Earth.
A
Earth has an atmosphere, liquid water, and a moderate temperature.
B
Earth is the only planet with a magnetic field
C
Earth is larger than Mercury and Mars, but smaller than Jupiter and Saturn.
D
Earth is just the right size to support both plant and animal life
2) Day and night on Earth are due to:
A
the moon's orbit around the Earth
B
The Earth's rotation
C
the Earth's revolution
D
the Earth's tilted axis
3) The revolution of the Earth around the sun takes approximately....
A
one day
B
one decade
C
one month
D
one year
4) What is the central and largest body in the solar system?
A
sun
B
Earth
C
moon
D
Jupiter
5) What force keeps the planets in a regular and predictable motion around the sun?
A
nuclear energy
B
solar energy
C
cicumference
D
gravity
6) Which of the following correctly describes the sun?
A
it is a star where nuclear reactions occur.
B
it is a planet with a rocky surface
C
it is a satellite that revolves around the planet
D
it is a planet which has nuclear reactions that produce energy
7) How long does it take the moon to revolve around the Earth?
A
1 day
B
7 days
C
365 days
D
29.5 days
8) If an astronaut weighs 100 pounds on Earth, approximately what would he weigh on the moon?
A
0 (there is no gravity in space)
B
100 pounds
C
200 pounds
D
30 pounds
9) Auroras, or the northern lights, are caused by....
A
protons and neutrons from solar winds mixing with gases in the Earth's atmosphere
B
solar winds
C
light reflecting off the polar caps
D
the sun
10) Regions of the sun that are cooler than the rest of the photosphere are known as....
A
solar flares
B
prominences
C
sunspots
D
spicules
*select an answer for all questions
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