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Astronomy Unit Review

Total questions: 95

Worksheet time: 58mins

Name
Class
Date
1.
True or False:  Planets, stars, and comets are all objects that orbit our Sun. 
a)
True
b)
False- only planets & comets can orbit the Sun
c)
False- only planets & stars can orbit the Sun
d)
False- planets are the only objects that orbit the Sun
2.
Which of the following is a TRUE statement:
a)
Our Sun is the center of our galaxy
b)
Our Sun is located on the very outside of our galaxy
c)
Our Sun is on one of the arms in our galaxy that is approximately 2/3 away from its center
d)
Our Sun is on one of the arms in our galaxy that is closer to its center
3.
Planets closer to the sun have a ___________ gravitational attraction along with a ___________ revolution speed when compared to outer planets. 
a)
weaker, slower
b)
weaker, faster
c)
stronger, faster
d)
stronger, slower
4.
Which of the following forces determines Earth's position in space?
a)
The balanced forces of Earth's gravity and the sun's gravity
b)
The balanced forces of the Milky Way acting on Earth 
c)
The unbalanced force of the Earth's gravitational pull on the sun
d)
The unbalanced force of the sun's gravitational pull on the Earth
5.
Galaxies are classified according to their _____________
a)
size
b)
temperature
c)
shape
d)
planets
6.
Our Milky Way is a ______________ galaxy.
a)
spiral
b)
elliptical
c)
irregular
d)
burst
7.
Which of the following can be located between the planet Mars and the planet Jupiter?
a)
meteor shower
b)
asteroid belt
c)
comet
d)
meteorite
8.
True or False:  The smallest known planet, is also the planet with the greatest density.  
a)
True- Mercury is the smallest planet as well as the most dense
b)
True- Neptune is the smallest planet as well as the most dense
c)
False- Mercury is the smallest planet, but Jupiter has the greatest density
d)
False- Earth is the smallest planet, but Mars has the greatest density
9.
Our universe is constantly __________________ because galaxies are moving ______________ each other.
a)
shrinking, towards
b)
rotating, around
c)
growing, away from
10.
The Milky Way is the galaxy that contains our Solar System. The name is from its appearance as a dim "milky" glowing band arching across the night sky, in which the naked eye cannot distinguish individual stars.
a)
TRUE
b)
FALSE
11.
The initial explosion that resulted in the formation and expansion of the universe and has been expanding ever since. Also, this explosion released all of the matter and energy that exists in the universe today.
a)
The Accelerating Universe
b)
Plasma Cosmology
c)
The Standard Model
d)
The Big Bang 
12.
The _____ ______ is a single star (sun), planets, and all the other objects that revolve around the sun
a)
big bang
b)
solar system
c)
milky way
13.
All of space and everything in it including stars, planets, galaxies, etc.
a)
galaxy
b)
solar system
c)
universe
14.
A model of the solar system in which Earth and the other planets revolve around the SUN
a)
Heliocentric
b)
Geocentric
15.
A model of the universe in which Earth is at the center of the revolving planets and stars. This includes the sun revolving around the Earth. This model was proven wrong.
a)
Geocentric
b)
Heliocentric
16.
The fourth planet from the sun; a terrestrial planet with a thin atmosphere composed primarily of carbon dioxide
a)
Mercury
b)
Venus
c)
Mars
d)
Jupiter
17.
A large body in space that orbits a star and does not produce light of its own.
a)
asteroid
b)
comet
c)
meteor
d)
planet
18.
The smallest planet; Closest planet to the sun; has a thin atmosphere w/ temp. extremes, an iron core, & many craters & high cliffs
a)
Mercury
b)
Venus
c)
Earth
d)
Mars
19.
The sixth planet from the Sun and the most distant that can be seen with the naked eye. It is best known for its fabulous ring system and has 150 moons. It is one of the 4 "gas giants"
a)
Jupiter
b)
Saturn
c)
Uranus
d)
Neptune
20.
A ball of frozen dust and rock that orbits the sun in a very narrow ellipsis (oval) and has a tail that glows
a)
asteroid
b)
comet
c)
meteor
d)
star
21.
Any of numerous small celestial bodies composed of rock and metal that move around the sun (mainly between the orbits of Mars and Jupiter); they are too small to be considered planets
a)
asteroid
b)
comet
c)
meteor
d)
planet
22.
A small body of matter from outer space that enters the earth's atmosphere, as a result of friction it appears as a streak of light in the sky
a)
asteroid
b)
comet
c)
meteor
d)
planet
23.
The path an object follows as it moves around another object
a)
orbit
b)
range
24.
The tendency of a body to maintain its state of rest (stay still) or motion unless acted upon by an external force (like a push or a pull)
a)
friction
b)
gravity
c)
inertia
d)
velocity
25.
Attractive force between two objects that depends on the masses of the objects and the distance between them.
a)
friction
b)
gravity
c)
inertia
d)
velocity
26.

According to scientists, approximately how many billion years ago did the Big Bang occur?

a)

3-6

b)

11-15

c)

17-20

d)

20-25

27.

According to scientists, what does the universe continue to do because of the initial Big Bang explosion?

a)

contract

b)

shrink

c)

expand

d)

stay the same

28.

What process condensed the large cloud of gas and dust?

a)

fission

b)

fusion

c)

gravity

d)

inertia

29.

According to scientists, what did the universe originally consist of?

a)

A large, hot star that exploded

b)

A dense, cool star that exploded

c)

A small, hot, dense singularity

d)

A small, cool, dense singularity

30.

A galaxy is...

a)

The Big Bang

b)

A group of stars, gas, and dust held together by gravity

c)

A cloud of gas and dust

d)

A singe star and the planets that orbit it

31.

Identify the first 2 elements to form after the Big Bang.

a)

Hydrogen & Helium

b)

Hydrogen & Oxygen

c)

Helium & Oxygen

d)

Oxygen & Argon

32.

According to the Big Bang Theory, the universe is about _____________ years old.

a)

4.5 billion

b)

4.5 million

c)

13.7 billion

d)

13.7 million

33.

Multiple galaxies make up ____________________.

a)

solar systems

b)

the universe

c)

the Milky Way

d)

asteroids

34.

Which scientists were supporters of the geocentric model?

a)

Ptolemy and Aristotle

b)

Ptolemy and Copernicus

c)

Copernicus and Aristotle

35.

How does energy from the sun help maintain life on Earth?

a)

heats Earth's atmosphere, stabilizes temperatures, creates environments suitable for life

b)

forms the ocean's water and oxygen in the atmosphere

c)

prevents destruction of the magnetic field around Earth

d)

is absorbed by Earth's mantle, driving plate tectonics

36.

Which of the following is the largest system in the universe, which Earth is only a very small part of?

a)

Jovian planets

b)

Halley's comet

c)

Milky Way galaxy

d)

Orion's belt

37.

How long does it take Earth to make one complete rotation on its axis at the equator?

a)

12 hours

b)

24 hours

c)

29.5 days

d)

365 days

38.

What is one purpose of a telescope?

a)

to collect less light for the eye

b)

to collect more light for the eye

c)

to make small, close objects larger

d)

to make large, faraway objects smaller

39.

Which planets are most like Earth?

a)

Mars and Jupiter

b)

Venus and Neptune

c)

Mars and Venus

d)

Jupiter and Neptune

40.

Which statement is true about our solar system?

a)

The Sun is located at the very edge of our solar system.

b)

The Moon has an atmosphere of gases around it.

c)

The Moon is a natural satellite which orbits Earth.

d)

The Earth is the fourth orbiting planet from the Sun.

41.

What is the correct order of the planets?

a)

Mercury, Mars, Venus, Earth, Jupiter, Saturn, Uranus, Neptune

b)

Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune

c)

Venus, Mercury, Earth, Jupiter, Mars, Saturn, Uranus, Neptune

d)

Mercury, Venus, Earth, Mars, Jupiter, Saturn, Neptune, Uranus

42.

Which planets are the rocky planets?

a)

Venus, Earth, Neptune, Mars

b)

Jupiter, Earth, Mercury, Venus

c)

Mercury, Earth, Saturn, Neptune

d)

Mercury, Mars, Venus, Earth

43.

List the names of the gaseous planets.

a)

Venus, Jupiter, Neptune, Earth

b)

Saturn, Jupiter, Neptune, Uranus

c)

Mercury, Neptune, Venus, Saturn

d)

Neptune, Venus, Jupiter, Saturn

44.

What are two important resources that the sun provides that is needed by life in Earth?

a)

oxygen, light

b)

heat, light

c)

water, oxygen

d)

seasons, light

45.
Mercury 
a)
1st 
b)
2nd 
c)
3rd 
d)
4th 
46.

Venus ( thick atmosphere that traps in heat) ((hottest planet))

a)

1st

b)

2nd

c)

3rd

d)

4th

47.
Earth 
a)
1st 
b)
2nd 
c)
3rd 
d)
4th 
48.

Mars (gets its reddish color from the iron in the dust and sane)

a)

1st

b)

2nd

c)

3rd

d)

4th

49.

Jupiter ( giant red spot is a storm)

a)

5th

b)

6th

c)

7th

d)

8th

50.

Saturn

a)

5th

b)

6th

c)

7th

d)

8th

51.
Uranus 
a)
5th 
b)
6th 
c)
7th 
d)
8th 
52.
Neptune 
a)
5th 
b)
6th 
c)
7th 
d)
8th 
53.

Inner Planets- select all that apply

a)

dense core

b)

rocky

c)

few moons

d)

thin atmosphere

e)

smaller than outer planets

54.

Outer Planets- select all that apply

a)

small inner cores

b)

larger

c)

gaseous

d)

many moons

e)

temperatures are colder than inner planets

55.

What planet is closest to the sun?

a)

Mars

b)

Earth

c)

Venus

d)

Mercury

56.

What are the four inner planets?

a)

Earth, Uranus, Mercury, Venus

b)

Mercury Venus Earth Saturn

c)

Mars, Earth , Mercury, Venus

d)

Mars, Earth, Neptune, Mercury

57.

Which planet is farthest from the sun?

a)

Neptune

b)

Jupiter

c)

Mercury

d)

Uranus

58.

What are the outer planets?

a)

Jupiter, Saturn, Earth, Neptune

b)

Saturn, Neptune, Mars, Uranus

c)

Uranus, Saturn, Neptune, Jupiter

d)

Mercury, Venus, Earth, Mars

59.

Which two facts describe Earth?

a)

inner planet

b)

outer planet

c)

terrestrial planet

d)

gas giant

60.

How many planets are in our solar system?

a)

6

b)

7

c)

8

d)

9

61.

Which planets are all outer planets?

a)

gas giants

b)

terrestrial planets

62.

Which planets are all inner planets?

a)

gas giants

b)

terrestrial planets

63.

All gas giants/outer planets have this in common except:

a)

number of moons

b)

made mainly of hydrogen and helium

c)

thick atmosphere

d)

large masses

64.

twice the mass of all planets combined

a)

Jupiter

b)

Saturn

c)

Uranus

d)

Neptune

65.

rotates fastest on its axis (shortest day of all planets)

a)

Jupiter

b)

Saturn

c)

Uranus

d)

Neptune

66.

Great Red Spot is a giant hurricane-like storm

a)

Jupiter

b)

Saturn

c)

Uranus

d)

Neptune

67.

least dense planet, could float in water

a)

Jupiter

b)

Saturn

c)

Uranus

d)

Neptune

68.

largest and most notable ring system of all planets

a)

Jupiter

b)

Saturn

c)

Uranus

d)

Neptune

69.

methane in the atmosphere gives this planet a blue-green color

a)

Jupiter

b)

Saturn

c)

Uranus

d)

Neptune

70.

98 degree tilt on its axis makes it seem like it is rolling like a ball as it orbits the sun

a)

Jupiter

b)

Saturn

c)

Uranus

d)

Neptune

71.

farthest known planet from the sun

a)

Jupiter

b)

Saturn

c)

Uranus

d)

Neptune

72.

methane in its atmosphere gives it a very blue color

a)

Jupiter

b)

Saturn

c)

Uranus

d)

Neptune

73.

Big dark blue spot which is similar to an Earth's hurricane

a)

Jupiter

b)

Saturn

c)

Uranus

d)

Neptune

74.

Which planet has two moons?

a)

Mars

b)

Venus

c)

Earth

d)

Mercury

75.

Which planet has the longest year?

a)

Mars

b)

Venus

c)

Earth

d)

Mercury

76.

Which planet has an atmosphere that allows life?

a)

Mars

b)

Venus

c)

Earth

d)

Mercury

77.

Which planet is the hottest?

a)

Mars

b)

Venus

c)

Earth

d)

Mercury

78.

Which planet has the thinnest atmosphere?

a)

Mars

b)

Venus

c)

Earth

d)

Mercury

79.

Which of the following characteristics is common to ALL FOUR planets in the inner solar system?

a)

have one or two moons

b)

have a solid rocky surface

c)

have a thin, toxic, atmosphere

d)

have the same orbit length around the sun

80.

Which is found in the belt between Mars and Jupiter

a)

Comets

b)

Asteroids

c)

Meteors

d)

Stars

81.

A meteorite is DIFFERENT from a comet mainly because

a)

has a tail of ice and gas

b)

is found in orbit between Jupiter and Mars

c)

enters the Earth's atmoshere

d)

has a nucleus made of rock and snow.

82.
Sometimes I am called a "dirty snowball". I have a hydrogen cloud, coma, and a nucleus. I am invisible except when near the sun. What am I?
a)
Asteroid
b)
Star
c)
Meteor
d)
Comet
83.
The tail of a comet usually faces
a)
toward the sun
b)
toward the Earth
c)
away from the Sun
d)
away from the Earth
84.

These are composed mainly of rock and metal.

a)

comets and stars

b)

stars and meteors

c)

asteroid and meteors

d)

comets and asteroid

85.

I am a rock entering a planet's atmosphere.

a)

meteor

b)

moon

c)

asteroid

d)

comet

86.

The shape of comet's paths are ________________.

a)

circular

b)

elliptical

c)

irregular

87.

Which object in space is larger?

a)

Asteroid

b)

Meteoroid

88.
What do comets, asteroids and meteors all have in common?
a)
They all are made of ice
b)
They all hit Earth's surface
c)
They all orbit the sun
d)
They have nothing in common
89.

A meteor when it burns in the atmosphere is also known as a ____.

a)

rock

b)

shooting star

c)

ball of ice

90.
An event when the earth passes through a region having lots of debris
a)
Bolid
b)
Fireball
c)
Meteor
d)
Meteor Shower
91.
Theory which explains that the universe began as a point and has been expanding ever since.
a)
Geocentric Model
b)
Heliocentric Model
c)
Big Bang Theory
d)
Cosmology
92.

Pick the prediction of the big bang theory?

a)

The universe should be made of mostly Hydrogen & Helium

b)

A cosmic shockwave throughout the universe should not exist

c)

The expansion of the universe should slow down and stop

d)

The universe should not be expanding

93.

A theory that started from a singularity and inflated over the next approximately 13.7 B years.

a)

Inflation theory

b)

Oscillating theory

c)

Big bang theory

94.

Nebular theory is the formation of the ____________.

a)

Universe

b)

Galaxies

c)

Solar system

95.

Big bang theory is the formation of the ___________.

a)

Solar system

b)

Universe

c)

Planets

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