Chapter 20 Review Question Preview (ID: 38511)


Review For Chapter 20. TEACHERS: click here for quick copy question ID numbers.

What are the three types of galaxies?
a) Circle, box, spiral
b) Spiral, irregular, elliptical
c) Elliptical, irregular, oblong
d) Irregular, regular, spiral

What does a spiral galaxy look like?
a) It has no particular shape.
b) It is shaped like a cone
c) It is shaped like a pinwheel
d) It is shaped like a big circle

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.

Describe the surface of Mars.
a) It is covered with dirt
b) It is covered with red dust that blows to create pink skies, and has polar caps that change with the seasons.
c) It is black due to the volcanic rock there, and has polar caps that change with the seasons.
d) It is blue due to the water it holds, and has polar caps that change with the seasons.

5. What is the atmosphere like on Mars?
a) It is mostly nitrogen with some oxygen mixed in.
b) It is mostly carbon dioxide.
c) It is mainly hydrogen with some oxygen.
d) It is mainly oxygen with sulfuric acid in it.

What distance does one AU represent in our Solar System?
a) The distance from the Sun to a planet.
b) The distance from Earth to Mars.
c) The distance from Earth to Jupiter.
d) The distance from the Sun to Earth.

How long is one AU?
a) Approximately 93 million kilometers or 149.6 million kilometers.
b) Approximately 149. 6 million kilometers, or about 93 million miles.
c) Approximately 200 billion kilometers or 100 million miles.
d) Approximately 100 million kilometers or 200 billion miles.

What is the surface and atmosphere of Venus like?
a) It is red with pink skies from the blowing dirt. Atmosphere carbon dioxide.
b) It is much like Earths surface, rocky with lakes. Atmosphere of oxygen and nitrogen.
c) Rocky with volcanoes likely, atmosphere is mostly carbon dioxide with sulfuric gas.
d) It is smooth and green, with nitrogen in the atmosphere.

What two things affect gravitational attractions?
a) Mass and weight.
b) Mass and distance.
c) Distance and weight.
d) Distance and how close it is to something else.

Which planet has the most gravitational pull?
a) Mars
b) Earth
c) Sun
d) Jupiter

What unit do we use to measure distance in our Solar System?
a) Inches
b) The yards
c) The light year
d) The AU

What unit do we use to measure distances outside our Solar System?
a) The AU
b) The light year
c) We have no way to measure that distance.
d) Miles

What is a star’s magnitude?
a) How far it is from Earth
b) How close the star is to the next galaxy
c) How bright the star is.
d) The temperature of the star.

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.

What type of star is the Sun?
a) A very hot one.
b) A medium sized star
c) A large star.
d) A small star.

Who named the constellations?
a) The ancient cavemen
b) The ancient Romans
c) The ancient Greeks
d) The ancient Indians

Why does Earth have tides on some sides of the Earth?
a) Due to the gravitational pull of the planets passing near the Earth
b) Due to the gravitational pull of the Sun on Earth
c) Due to the gravitational pull of the Moon and the Sun on Earth.
d) Due to the gravitational pull of Mercury and Venus on Earth.

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

What type of galaxy is Earth located in?
a) It is not in a galaxy
b) An irregular
c) An elliptical
d) a spiral

What is the name of our galaxy?
a) The 'hat' galaxy
b) The Andromeda galaxy
c) The Milky Way.
d) The milk maids path

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