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Unit 7 Review

Total questions: 121

Worksheet time: 1hrs 29mins

Name
Class
Date
1.
What is gravity?
a)
A force
b)
Energy
c)
A push
d)
All of them
2.
Without gravity we would________. 
a)
Float away
b)
Stay in the ground
c)
Nothing would happen.
d)
I don't know
3.
Which has more mass, Earth or the Moon?
a)
Earth
b)
Moon
c)
The same
4.
Which has a STRONGER force of gravity, Earth or the Moon?
a)
Earth
b)
Moon
5.
Why can astronauts jump and float a little on the Moon?
a)
Because the Moon's gravity is NOT that STRONG.
b)
Because the Moon's gravity is VERY STRONG. 
6.
What is mass?
a)
How much MATTER makes up an object.
b)
How much GRAVITY is pulling an object.
7.
Where would you weight more, on Earth or on the Moon?
a)
Earth
b)
Moon
8.
The law of universal gravitation is credited to whom?
a)
Einstein
b)
Galileo
c)
Darwin
d)
Newton
9.

What two things determine the gravity of an object?

a)

mass & weight

b)

mass & distance

c)

density & mass

d)

volume & distance

10.

When will the forces of gravity between two objects be the GREATEST?

a)

when the masses of both objects are small and the objects are far apart

b)

when the masses of both objects are large and the objects are close together

c)

when the masses of both objects are small and the objects are close together

d)

when the masses of both objects are large and the objects are far apart

11.

When will the gravity between two objects be the LEAST?

a)

when the masses of both objects is small and the objects are close together

b)

when the masses of both objects is small and the objects are far apart

c)

when the masses of both objects is large and the objects are close together

d)

when the masses of both objects is large and the objects are far apart

12.

Which statement about gravity is true?

a)

gravity causes objects to pull towards one another

b)

gravity causes objects to push away from each other

c)

gravity only takes place between planets

d)

the moon doesn't have any gravity

13.
What is the SI unit used to measure force? 
a)
pounds 
b)
grams 
c)
newtons 
d)
kg/ m2
14.
As mass increases, what happens to gravitational force?
a)
increases
b)
decreases
c)
stays the same
d)
i don't know
15.
Which model has greater gravitational attraction (if any)
a)
Model A
b)
Model B
c)
Both Model A and Model B (same gravity)
16.
Which system has the greater gravitational attraction between the two objects (if any)?
a)
System A
b)
System B
c)
Same gravitational attraction fro System A and System B
17.
Which System has the greater gravitational pull between the two objects?
a)
System 1
b)
System 2
c)
Same: there is no gravitational attraction between the two objects
18.

More mass equals:

a)

less gravity

b)

less distance

c)

more gravity

d)

more distance

19.

Less mass equals:

a)

less gravity

b)

less distance

c)

more gravity

d)

more distance

20.

What two things determine the gravity of an object?

a)

mass & weight

b)

mass & distance

c)

density & mass

d)

volume & distance

21.
Which of the following will not change in different gravitational fields?
a)
weight
b)
force
c)
mass
d)
pounds
22.

What keeps the planets in orbit around the sun?

a)

gravity

b)

friction

c)

density

d)

distance

23.
Gravity on Mars’ surface is much lower than it is here on Earth. This is because the mass of mars is ______ than Earth.
a)
less
b)
more
c)
the same
24.
Go 3 times farther away and the force of gravity drops by _____
a)
3 times
b)
6 times
c)
9 times
d)
12 times
25.
Who realized that planetary orbits aren't necessarily circular?
a)
Isaac Newton
b)
Galileo Galilei
c)
Johannes Kepler
d)
Robert Hooke
26.
The planets of our solar system have orbits that are _____
a)
circular
b)
ellipses
c)
parabolas
d)
hyperbolas
27.
In order to break free of a planet's gravity, an object must be moving faster than the _____
a)
escape velocity
b)
getaway acceleration
c)
break-away pace
d)
liberation altitude
28.
What is the escape velocity of the Earth?
a)
about 11 kilometers per second
b)
about 110 kilometers per second
c)
about 11 kilometers per hour
d)
about 110 kilometers per hour
29.
An object moving along a path controlled by gravity is said to be _____
a)
in orbit
b)
in constant motion
c)
in uniform motion
d)
massless
30.

Who was the first man on the moon?

a)

President Obama

b)

Martin L. King, Jr.

c)

Buzz Lightyear

d)

Neil Armstrong

31.
What object is launched into orbit and designed to send and receive information?
a)
rover
b)
satellite
c)
space shuttle
d)
space probe
32.
I orbit Earth and help your cell phones work. What am I?
a)
Space Shuttle 
b)
Rover
c)
Satellite
d)
Rocket
33.

Why are space suits necessary for astronauts working on the surface of another planet?

a)

Space suits provide the weight needed to hold astronauts down on the planet's surface.

b)

Space suits allow astronauts to carry things that normally would be too heavy.

c)

Space suits make an astronaut more visible to other astronauts

d)

Space suits provide protection from radiation and offer normal air pressure inside.

34.

Russia sent the first artificial satellite, ______________, into Earth's orbit

a)

Explorer 1

b)

Apollo 1

c)

Sputnik 1

d)

Gemini 1

35.
A tool for viewing and observing
a)
telescope
b)
space shuttle
36.
The order of the planets is:
a)
Mars,Venus,Earth,
Mercury,Saturn
Jupiter, Uranus, Neptune
b)
Earth,Venus,Mars
Jupiter, Neptune,
Mercury,Saturn,
Uranus
c)
Mercury,Venus,Earth
Mars,Jupiter,
Saturn,Uranus
Neptune
37.
True or False
The Earth is the center of the solar system.
a)
True
b)
False
38.
True or False
The planets are not lined up in a perfectly straight line
a)
True
b)
False
39.
Which planet has had rovers sent to it to study its soil?
a)
Mercury
b)
Venus
c)
Earth
d)
Mars
40.
Which planet rotates on its side?
a)
Jupiter
b)
Saturn
c)
Uranus
d)
Neptune
41.
Which planet is the largest?
a)
Jupiter
b)
Saturn
c)
Uranus
d)
Neptune
42.
Which planet has iron in its soil and is the red planet?
a)
Mercury
b)
Venus
c)
Earth
d)
Mars
43.
What is a common characteristic of the inner planets?
a)
Large
b)
Gaseous
c)
Rings
d)
Rocky Surface
44.
What is the ISS?
a)
International Student Services
b)
Inside Sun Secrets
c)
International Space Station
d)
Iraq Space Services
45.
Instrument that travels into the solar system, gathers information and sends it back to Earth
a)
Space shuttle
b)
Rocket
c)
Space ship
d)
Space probe
46.
Which space equipment transports humans into space from Earth?
a)
space shuttle
b)
space prove
c)
satellite
47.

A vehicle designed to propel itself by ejecting exhaust gas from one end

a)

shuttle

b)

rocket

c)

satellite

d)

probe

48.

the moon orbiting the earth is an example of:

a)

natural satellite

b)

artificial satellite

49.

The Hubble telescope was put in space to:

a)

take images past the atmosphere

b)

it is closer to the sun

c)

too big for Earth

d)

its not really in space

50.

What is the artifical satellite that orbits Earth

a)

Hubble Telescope

b)

Spirit

c)

Opportunity

d)

Challenger

51.
What is the only celestial body that has liquid water naturally available?
a)
Mars
b)
Earth
c)
The Moon
d)
Phobos (one of Mars' moons)
52.
Is Mars warmer or colder than Earth?
a)
Warmer
b)
Colder
c)
Both
d)
Same temperature
53.
The force that keeps planets on there orbit...
a)
orbit
b)
stars
c)
planets
d)
gravity
54.

Who became the first person to journey into outer space traveling aboard Vostok 1 in April of 1961?

a)

John Glenn

b)

Alan Shepard

c)

Neil Armstrong

d)

Yuri Gagarin

55.

Who became the first American astronaut to journey into outer space traveling aboard Freedom 7 in May of 1961?

a)

John Glenn

b)

Alan Shepard

c)

Neil Armstrong

d)

Yuri Gagarin

56.

On July 16, 1969, three U.S. astronauts set off on the Apollo 11 space mission to attempt the...

a)

first lunar (moon) landing

b)

first orbit of the Earth

c)

first journey into outer space

57.

Which country was the first to send a man into space?

a)

Soviet Union

b)

United States of America

58.

The United States launched its own artificial satellite, _______ into space in 1958.

a)

Explorer I

b)

Sputnik

59.

The ________ was the first human spaceflight program of the United States to put a man into Earth orbit and return him safely.

a)

Project Mercury

b)

Project Apollo

60.
Any object that revolves around another object
a)
orbiter
b)
satellite
c)
moon
d)
stalker
61.
Type of optical telescope that uses a curved or concave mirror to reflect light
a)
Refracting
b)
Reflecting
c)
Radio
d)
Visual
62.

How many moons does mercury have ?


¿Cuántas lunas tiene mercurio?

a)

0

b)

9

c)

22

d)

56

63.
Which planet has the largest continuous hurricane?
a)
Earth
b)
Mars
c)
Jupiter
d)
Saturn
64.
Which of the following is not true?
Planets closer to the sun...
a)
are hotter
b)
revolve slower
c)
have less moons
d)
are smaller
65.
The inner and outer planets are divided by...
a)
The asteroid belt
b)
The oort cloud
c)
The kuiper belt
d)
a fraction
66.
What is the correct order of planets from the sun?
a)
Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune
b)
Mars, Venus, Earth, Mercury, Jupiter, Saturn, Uranus, Neptune
c)
Mercury, Venus, Earth, Mars, Jupiter, Saturn, Neptune, Uranus
d)
Jupiter, Saturn, Venus, Earth, Pluto, Mars, Mercury, Neptune
67.
What does the word terrestrial mean?
a)
Warm planets
b)
planets with moons
c)
planets with ailens
d)
Rocky planets
68.
Compared to the inner planets, the outer planets are...
a)
larger
b)
warmer
c)
denser
d)
better
69.
Which planet is known for it's red, rust covered surface?
a)
Venus
b)
Mercury
c)
Mars
d)
Jupiter
70.
Which is the hottest planet?
a)
Mercury
b)
Venus
c)
Earth
d)
Neptune
71.
How many planets are there?
a)
7
b)
8
c)
9
d)
10
72.
The difference between a moon and a planet is...
a)
A moon is made of rock, a planet is made of gas
b)
Moons can only be seen with a telescope
c)
Moonss revolve around a planet, planets revolve around a sun
d)
That's no moon... ITS A SPACE STATION!
73.

Which planets are the terrestrial planets?

a)

Mercury, Venus, Earth, Mars

b)

Jupiter, Saturn, Uranus, Neptune

c)

Mercury, Venus, Earth, Saturn

d)

Jupiter, Mercury, Venus, Earth

74.

Which planets are the gas giants?

a)

Mercury, Venus, Earth, Mars

b)

Jupiter, Saturn, Uranus, Neptune

c)

Mercury, Venus, Earth, Saturn

d)

Jupiter, Mercury, Venus, Earth

75.

Which planet is the smallest planet?

a)

Mercury

b)

Neptune

c)

Saturn

d)

Jupiter

76.

Which planet is tipped on its side?

a)

Neptune

b)

Jupiter

c)

Saturn

d)

Uranus

77.

Which planet is know as the Morning Star?

a)

Earth

b)

Mars

c)

Mercury

d)

Venus

78.

Which planet is closest to the sun?

a)

Mercury

b)

Earth

c)

Venus

d)

Mars

79.
8th  planet from the sun 
a)
Jupiter 
b)
Saturn 
c)
Uranus 
d)
Neptune 
80.

Inner Planets- select all that apply

a)

dense core

b)

rocky

c)

few moons

d)

thin atmosphere

e)

smaller than outer planets

81.

Outer Planets- select all that apply

a)

small inner cores

b)

larger

c)

gaseous

d)

many moons

e)

temperatures are colder than inner planets

82.

What is at the center of our solar system?

a)

asteroid belt

b)

Earth

c)

sun

d)

moon

83.

What is the sixth planet from the sun?

a)

Uranus

b)

Saturn

c)

Earth

d)

Venus

84.

Which two facts describe Earth?

a)

inner planet

b)

outer planet

c)

terrestrial planet

d)

gas giant

85.
Which is hotter: Venus or Mercury?
a)
Venus
b)
Mercury
c)
They are exactly the same.
d)
Sun
86.
What is the coldest planet?
a)
Uranus
b)
Neptune
c)
Pluto
d)
Venus
87.
What has NASA sent to Mars to roam around and take pictures?
a)
Rovers
b)
Dogs
c)
Pencils
d)
Humans
88.
What is Earth's nickname?
a)
The Blue Planet
b)
The Green Planet
c)
The Life Planet
d)
The Big Bang
89.
Which planet is considered Earth's twin?
a)
Venus
b)
Sun
c)
Moon
d)
Mars
90.
What is one thing Venus and Earth have in common?
a)
Almost the same size
b)
Toxic atmosphere
c)
Water
d)
All of the above
91.
Which planet is named after the god of the sea?
a)
Neptune
b)
Mars
c)
Jupiter
d)
Mercury
92.
Saturn is known for it's _______. 
a)
rings
b)
atmopshere
c)
moons
d)
temperature 
93.
Saturn's rings are made of chunks of 
a)
volcanoes
b)
ice and rock
c)
nitrogen and helium 
d)
ice and 
94.
Hydrogen and Helium make up the _______.
a)
Inner Planets 
b)
Gas gaints
c)
Middle Planets 
d)
Terrestrial Planets 
95.
Pluto, among others, is known as a ____.
a)
dwarf planet 
b)
planet
96.
Objects made of ice, gas and dust and orbit our sun are called:
a)
Asteroids
b)
Comets
c)
moon
d)
Meteors
97.
When a meteoroid STRIKES the surface of the earth scientists refer to them as:
a)
Asteroids
b)
Comets
c)
Meteors
d)
Meteorites 
98.
Millions of pieces of rocky material of various sizes orbit the Sun between the orbits of Mars and Jupiter. These objects are known as -
a)
Asteroids
b)
Meteors
c)
Comets
d)
Planets
99.
A shooting star is actually a...
a)
Comet
b)
Meteoroid
c)
Meteorite
d)
Meteor
100.
A small object that enters Earth's atmosphere from space and burns due to friction, emitting light.
a)
meteor
b)
comet
c)
asteroid
d)
star
101.
Phobos is a celestial object that orbits Mars and is made mostly of rock. This celestial body is a 
a)
moon
b)
asteroid
c)
planet
d)
meteoroid
102.

What is the difference between asteroids and meteoroids?

a)

shape

b)

color

c)

size

d)

spelling

103.

Which force is needed to keep planets formed and within their orbit?

a)

friction

b)

electromagnetic energy

c)

gravity

104.
Contains the sun and celestial objects that orbit it
a)
Big Bang Theory
b)
Solar System
c)
Meteor
d)
Astronomy
105.
large rock or gas objects that revolve around a star
a)
Sun
b)
asteroid
c)
meteor
d)
planet
106.
the scientific study of the universe
a)
Big Bang Theory
b)
Cosmos
c)
Astronomy
d)
Star study
107.
the scientific theory that explains how the universe was created
a)
Earth
b)
Shooting Star
c)
Chemical Romance
d)
The Big Bang Theory
108.
a system that contains billions of stars
a)
galaxy
b)
milky way
c)
solar system
d)
Astronomy
109.

Large dirty snowballs that orbit the sun in long elliptical orbits are called...

a)

asteroids

b)

meteoroids

c)

comets

d)

dwarf planets

110.

Check each celestial object made of rock and metal

a)

comet

b)

asteroid

c)

meteor

d)

outer planet

e)

inner planet

111.

A spacecraft controlled by scientists from Earth that flies by planets in deep space to take pictures is called...

a)

lander

b)

probe

c)

rover

d)

orbiter

112.

Which tools could be used to study a gas giant?

a)

rover

b)

probe

c)

telescope

d)

lander

e)

orbiter

113.

A tool that can be on Earth or orbiting Earth that helps scientists to see far into space is called...

a)

orbiter

b)

lander

c)

rover

d)

telescope

114.

Large metallic, rocky bodies that orbit the sun; found between Mars and Jupiter are called...

a)

asteroids

b)

meteoroids

c)

comets

d)

meteors

115.

A spacecraft controlled by scientists from Earth that flies by planets in deep space to take pictures is called a...

a)

orbiter

b)

rover

c)

International Space Station

d)

probe

116.

A smaller space rock found in the void of space is called...

a)

comet

b)

asteroid

c)

meteoroid

d)

meteor

117.

This transports astronauts and rovers onto a solid surface in space. It can perform experiments but cannot move.

a)

Lander

b)

Rover

c)

International Space Station

d)

Probe

118.

A science lab that orbits Earth where scientists live and work in zero gravity is called...

a)

rover

b)

International Space Station

c)

probe

d)

orbiter

119.

The gravitational attraction between two objects is reduced most when –

a)

the masses are decreased, and the distance between them is increased.

b)

the masses are decreased, and the distance between them is decreased.

c)

the masses are increased, and the distance between them is decreased.

d)

the masses are increased, and the distance between them is increased.

120.

If Neptune’s mass was reduced, which of the following could be done to maintain the same force of gravitational attraction between Neptune and the Sun?

a)

Increase the amount of energy the Sun puts out.

b)

Decrease the speed of rotation of Neptune.

c)

Increase the distance between Neptune and the Sun.

d)

Decrease the distance between Neptune and the Sun.

121.

Which best describes why gravity on Earth has a stronger attraction with you than the Sun has with you?

a)

Earth has more mass than the Sun, allowing a stronger attraction to form.

b)

The Sun has more mass than Earth.

c)

Earth has a smaller mass than the Sun, but it is much closer to you than the Sun, allowing for a stronger attraction.

d)

Earth has more magnetism than does the Sun.

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