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Chapter 20 Review
Test Description: Review for Chapter 20
Instructions: Answer all questions to get your test result.
1) What are the three types of galaxies?
A
Spiral, irregular, elliptical
B
Elliptical, irregular, oblong
C
Circle, box, spiral
D
Irregular, regular, spiral
2) What does a spiral galaxy look like?
A
It is shaped like a cone
B
It has no particular shape.
C
It is shaped like a big circle
D
It is shaped like a pinwheel
3) What is an asteroid?
A
A big piece of rock.
B
A piece of a planet
C
A large piece of metal.
D
A small body made of rock and metal.
4) Describe the surface of Mars.
A
It is black due to the volcanic rock there, and has polar caps that change with the seasons.
B
It is blue due to the water it holds, and has polar caps that change with the seasons.
C
It is covered with red dust that blows to create pink skies, and has polar caps that change with the seasons.
D
It is covered with dirt
5) 5. What is the atmosphere like on Mars?
A
It is mostly nitrogen with some oxygen mixed in.
B
It is mainly hydrogen with some oxygen.
C
It is mainly oxygen with sulfuric acid in it.
D
It is mostly carbon dioxide.
6) What distance does one AU represent in our Solar System?
A
The distance from Earth to Mars.
B
The distance from the Sun to Earth.
C
The distance from Earth to Jupiter.
D
The distance from the Sun to a planet.
7) How long is one AU?
A
Approximately 93 million kilometers or 149.6 million kilometers.
B
Approximately 200 billion kilometers or 100 million miles.
C
Approximately 149. 6 million kilometers, or about 93 million miles.
D
Approximately 100 million kilometers or 200 billion miles.
8) What is the surface and atmosphere of Venus like?
A
It is smooth and green, with nitrogen in the atmosphere.
B
It is red with pink skies from the blowing dirt. Atmosphere carbon dioxide.
C
It is much like Earths surface, rocky with lakes. Atmosphere of oxygen and nitrogen.
D
Rocky with volcanoes likely, atmosphere is mostly carbon dioxide with sulfuric gas.
9) What two things affect gravitational attractions?
A
Mass and distance.
B
Distance and how close it is to something else.
C
Distance and weight.
D
Mass and weight.
10) Which planet has the most gravitational pull?
A
Jupiter
B
Mars
C
Sun
D
Earth
11) What unit do we use to measure distance in our Solar System?
A
Inches
B
The AU
C
The yards
D
The light year
12) What unit do we use to measure distances outside our Solar System?
A
Miles
B
We have no way to measure that distance.
C
The AU
D
The light year
13) What is a star’s magnitude?
A
How bright the star is.
B
How far it is from Earth
C
How close the star is to the next galaxy
D
The temperature of the star.
14) What does a star’s color tell scientists?
A
Its brightness
B
The distance the star is from Earth
C
The approximate temperature of the surface of the star.
D
How the star was formed.
15) What type of star is the Sun?
A
A medium sized star
B
A very hot one.
C
A small star.
D
A large star.
16) Who named the constellations?
A
The ancient Indians
B
The ancient Greeks
C
The ancient cavemen
D
The ancient Romans
17) Why does Earth have tides on some sides of the Earth?
A
Due to the gravitational pull of the Sun on Earth
B
Due to the gravitational pull of the planets passing near the Earth
C
Due to the gravitational pull of Mercury and Venus on Earth.
D
Due to the gravitational pull of the Moon and the Sun on Earth.
18) Why do stars appear to move in the sky?
A
Because they are traveling at high rates of speed.
B
Because of the wind in outer space.
C
Due to the movement of the Moon.
D
Due to Earth’s movements and rotation
19) What type of galaxy is Earth located in?
A
An irregular
B
It is not in a galaxy
C
a spiral
D
An elliptical
20) What is the name of our galaxy?
A
The milk maids path
B
The Andromeda galaxy
C
The 'hat' galaxy
D
The Milky Way.
*select an answer for all questions
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