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Gravity and Planetary Motion

Total questions: 150

Worksheet time: 1hrs 15mins

Name
Class
Date
1.

What is gravity?

a)

A type of energy

b)

A force that pulls objects together

c)

The path an object moves

d)

The speed of an object

2.

What does mass describe?

a)

How fast an object moves

b)

How much matter an object has

c)

How bright an object is

d)

How far an object travels

3.

Which object has the strongest gravity?

a)

Moon

b)

Asteroid

c)

Planet

d)

Star

4.

What is an orbit?

a)

A straight path

b)

A curved path around another object

c)

A push between objects

d)

A type of force

5.

Which word best explains why objects attract each other?

a)

Orbit

b)

Mass

c)

Gravity

d)

Speed

6.

Objects with greater mass have ______ gravity.

a)

weaker

b)

no

c)

equal

d)

stronger

7.

What keeps planets moving around the Sun?

a)

Wind

b)

Light

c)

Gravity

d)

Heat

8.

Which factor most affects the strength of gravity?

a)

Color

b)

Mass

c)

Shape

d)

Temperature

9.

What happens when gravity pulls an object inward while motion moves it forward?

a)

Collision

b)

Straight-line motion

c)

Orbit

d)

Explosion

10.

Which object usually stays at the center of an orbit?

a)

Smaller object

b)

Faster object

c)

Object with more mass

d)

Object with less gravity

11.

Which force acts over long distances in space?

a)

Friction

b)

Gravity

c)

Magnetism

d)

Pressure

12.

Which term describes the movement of a moon around a planet?

a)

Spin

b)

Pull

c)

Orbit

d)

Push

13.

Why does gravity exist between objects?

a)

They have motion

b)

They have mass

c)

They have heat

d)

They have light

14.

What happens to gravity if mass increases?

a)

It decreases

b)

It stays the same

c)

It increases

d)

It disappears

15.

Which object has the least mass?

a)

Star

b)

Planet

c)

Moon

d)

Galaxy

16.

What force prevents objects in space from drifting apart?

a)

Speed

b)

Gravity

c)

Energy

d)

Light

17.

Which word best describes how objects move around one another?

a)

Mass

b)

Orbit

c)

Gravity

d)

Distance

18.

Gravity pulls objects ______.

a)

upward

b)

sideways

c)

together

d)

apart

19.

Which of the following has gravity?

a)

Only planets

b)

Only stars

c)

Only moons

d)

All objects with mass

20.

Which object has more gravity?

a)

Smaller mass

b)

Larger mass

c)

Faster speed

d)

Less distance

21.

If gravity disappeared, the solar system would ______.

a)

stay the same

b)

collapse inward

c)

drift apart

d)

spin faster

22.

Why does Jupiter have many moons?

a)

It spins quickly

b)

It has strong gravity

c)

It is cold

d)

It is far away

23.

What keeps Jupiter’s moons in orbit?

a)

Heat

b)

Gravity

c)

Rings

d)

Light

24.

Which planet has the most moons?

a)

Earth

b)

Mars

c)

Jupiter

d)

Mercury

25.

Saturn is known for its rings and ______.

a)

oceans

b)

mountains

c)

moons

d)

volcanoes

26.

Why do moons orbit planets?

a)

Speed

b)

Gravity

c)

Shape

d)

Light

27.

Which object has more mass?

a)

Moon

b)

Earth

c)

Jupiter

d)

Asteroid

28.

Why can Jupiter hold more moons than Earth?

a)

Faster rotation

b)

Larger size and mass

c)

More light

d)

Less distance

29.

What would happen if Saturn lost mass?

a)

More moons form

b)

Moons drift away

c)

Gravity increases

d)

Orbits tighten

30.

Moons orbit planets the same way planets orbit the ______.

a)

galaxy

b)

asteroid belt

c)

Sun

d)

stars

31.

Which force controls moon movement?

a)

Magnetism

b)

Gravity

c)

Pressure

d)

Energy

32.

Why don’t moons crash into their planets?

a)

No gravity

b)

Balanced orbit

c)

Lack of motion

d)

Shape

33.

Which planet has stronger gravity than Earth?

a)

Mars

b)

Mercury

c)

Jupiter

d)

Moon

34.

Why do moons follow curved paths?

a)

Motion only

b)

Gravity only

c)

Gravity and motion

d)

Size

35.

Which planet’s gravity affects the most nearby objects?

a)

Earth

b)

Venus

c)

Jupiter

d)

Mars

36.

Which object has the strongest gravity listed?

a)

Earth

b)

Moon

c)

Jupiter

d)

Asteroid

37.

Why do gas giants have strong gravity?

a)

Temperature

b)

Large mass

c)

Distance

d)

Color

38.

What keeps Saturn’s moons from escaping?

a)

Speed

b)

Gravity

c)

Rings

d)

Heat

39.

Which moon system shows strong gravity?

a)

Earth’s Moon

b)

Jupiter’s many moons

c)

Mars’ moons

d)

No moons

40.

Which factor affects how close a moon orbits?

a)

Color

b)

Gravity balance

c)

Shape

d)

Temperature

41.

What causes planets to stay in orbit around the Sun?

a)

Friction

b)

Gravity

c)

Magnetism

d)

Wind

42.

Which planet's gravity is strong enough to hold dozens of moons?

a)

Venus

b)

Jupiter

c)

Mars

d)

Earth

43.

What would happen to a moon if the planet it orbits lost a lot of mass?

a)

The moon would move closer

b)

The moon would drift away

c)

The moon would get heavier

d)

The moon would stop moving

44.

What causes moons to stay in orbit around planets?

a)

Gravity

b)

Light

c)

Color

d)

Temperature

45.

Which planet in our solar system has the most moons?

a)

Venus

b)

Jupiter

c)

Mars

d)

Earth

46.

What would happen to Earth's orbit if the Sun's gravity became weaker?

a)

Earth would stop orbiting

b)

Earth would drift away from the Sun

c)

Earth would move closer to the Sun

d)

Earth would spin faster

47.

What would happen to a moon if its planet's gravity became weaker?

a)

It would drift away

b)

It would spin faster

c)

It would change color

d)

It would move closer

48.

Which factor determines the size of a planet's gravitational pull?

a)

Distance from the Sun

b)

Number of moons

c)

Mass of the planet

d)

Temperature of the planet

49.

Why do planets with more mass have stronger gravity?

a)

Gravity increases with mass

b)

They have more moons

c)

They are closer to the Sun

d)

They spin faster

50.

Which planet has the weakest gravity?

a)

Jupiter

b)

Earth

c)

Mercury

d)

Saturn

51.

What is the main reason planets have moons?

a)

Size

b)

Temperature

c)

Gravity

d)

Color

52.

If a planet's mass increases, what happens to its gravity?

a)

Gravity decreases

b)

Gravity stays the same

c)

Gravity increases

d)

Gravity disappears

53.

Which planet has the weakest gravity in our solar system?

a)

Mercury

b)

Jupiter

c)

Earth

d)

Saturn

54.

What causes objects to stay in orbit around a planet?

a)

Electricity

b)

Gravity

c)

Friction

d)

Magnetism

55.

Which of the following would increase a planet's gravitational pull?

a)

Decreasing its mass

b)

Moving farther from the Sun

c)

Increasing its mass

d)

Reducing its temperature

56.

What would happen to a moon if its planet's gravity became weaker?

a)

The moon would move closer

b)

The moon would stop moving

c)

The moon would drift away

d)

The moon would spin faster

57.

Which factor increases the strength of gravity between two objects?

a)

Greater distance

b)

Less mass

c)

Lower speed

d)

More mass

58.

Why do planets not fall into the Sun?

a)

They have no gravity

b)

The Sun repels them

c)

They are pushed by the Sun

d)

Their motion balances gravity

59.

What is the main reason moons stay in orbit around planets?

a)

Temperature

b)

Light

c)

Gravity

d)

Color

60.

Which planet has the strongest gravitational pull in our solar system?

a)

Jupiter

b)

Earth

c)

Mars

d)

Venus

61.

What would happen to a planet if the Sun's gravity disappeared?

a)

The planet would get heavier

b)

The planet would fly off into space

c)

The planet would become a star

d)

The planet would keep orbiting

62.

What keeps the planets moving in their paths around the Sun?

a)

Heat

b)

Electricity

c)

Sound

d)

Gravity

63.

Which of these objects would have the least gravitational pull?

a)

Asteroid

b)

Earth

c)

Jupiter

d)

Sun

64.

What would happen if the Sun’s gravity suddenly stopped?

a)

Planets would move in straight lines

b)

Planets would orbit faster

c)

Planets would crash into the Sun

d)

Planets would stop moving

65.

What causes planets to orbit the Sun?

a)

Magnetism

b)

Wind

c)

Light

d)

Gravity

66.

Which of these objects has the greatest mass?

a)

Comet

b)

Earth

c)

Sun

d)

Moon

67.

What would happen to Earth's orbit if the Sun gained more mass?

a)

Earth would lose its gravity

b)

Earth would stop orbiting

c)

Earth would orbit faster and closer

d)

Earth would move farther away

68.

Which planet in our solar system has the strongest gravitational pull?

a)

Jupiter

b)

Earth

c)

Venus

d)

Mars

69.

What keeps the planets moving in their orbits around the Sun?

a)

Gravity

b)

Wind

c)

Light

d)

Heat

70.

Which planet would have the weakest gravity?

a)

Mercury

b)

Jupiter

c)

Earth

d)

Saturn

71.

Which force keeps the Moon in orbit around Earth?

a)

Light

b)

Magnetism

c)

Gravity

d)

Wind

72.

What would happen to planets if the Sun suddenly lost its gravity?

a)

They would move closer to the Sun

b)

They would stop moving

c)

They would spin faster

d)

They would drift away into space

73.

Which planet has the strongest gravity in our solar system?

a)

Jupiter

b)

Saturn

c)

Earth

d)

Mars

74.

Which force is responsible for keeping the Moon in orbit around Earth?

a)

Magnetism

b)

Gravity

c)

Electricity

d)

Friction

75.

What would happen to a planet if it lost its gravitational pull?

a)

It would get heavier

b)

It would become a star

c)

It would drift away in space

d)

It would stop moving

76.

Which object is most likely to be found at the center of a solar system?

a)

Asteroid

b)

Moon

c)

Star

d)

Comet

77.

What would happen to a moon if the planet it orbits lost its gravity?

a)

It would drift away into space

b)

It would stop moving

c)

It would become a star

d)

It would crash into the planet

78.

Which of the following objects has the weakest gravitational pull?

a)

Moon

b)

Asteroid

c)

Planet

d)

Star

79.

Why do planets stay in orbit around the Sun?

a)

Because of wind

b)

Because of heat

c)

Because of light

d)

Because of gravity

80.

Which force keeps satellites in orbit around Earth?

a)

Magnetism

b)

Friction

c)

Gravity

d)

Electricity

81.

What would happen to a moon if its planet lost gravity?

a)

The moon would become a planet

b)

The moon would crash into the planet

c)

The moon would drift away into space

d)

The moon would stop moving

82.

Which planet has the strongest gravitational pull in our solar system?

a)

Mars

b)

Jupiter

c)

Earth

d)

Saturn

83.

What would happen to a satellite if Earth's gravity suddenly disappeared?

a)

It would drift away into space

b)

It would crash into Earth

c)

It would become heavier

d)

It would orbit faster

84.

Which factor determines the strength of a planet's gravitational pull?

a)

Its color

b)

Its mass

c)

Its temperature

d)

Its speed

85.

Why do objects in space stay in motion instead of falling straight down?

a)

Because of magnetism

b)

Because of gravity and their forward motion

c)

Because of light

d)

Because of heat

86.

What causes objects to stay in orbit around planets?

a)

Light

b)

Heat

c)

Friction

d)

Gravity

87.

Which of these objects has the strongest gravitational pull?

a)

Asteroid

b)

Earth

c)

Jupiter

d)

Moon

88.

What would happen if Earth's gravity became much stronger?

a)

The Sun would get closer

b)

Objects would float away

c)

Objects would feel heavier

d)

Planets would stop moving

89.

What would happen to the Moon if Earth's gravity suddenly disappeared?

a)

It would crash into Earth

b)

It would orbit faster

c)

It would become heavier

d)

It would drift away into space

90.

Which force keeps satellites moving around planets?

a)

Heat

b)

Light

c)

Gravity

d)

Wind

91.

What would happen to a planet if it stopped moving forward in its orbit?

a)

It would move faster

b)

It would fall into the Sun

c)

It would gain more moons

d)

It would become a star

92.

Which planet has the most moons in our solar system?

a)

Jupiter

b)

Venus

c)

Earth

d)

Mars

93.

What keeps planets from flying off into space?

a)

Gravity from the Sun

b)

Wind

c)

Light

d)

Heat

94.

Which of these objects orbits a planet?

a)

Comet

b)

Asteroid

c)

Moon

d)

Sun

95.

Which planet has the strongest gravitational pull in our solar system?

a)

Venus

b)

Earth

c)

Jupiter

d)

Mars

96.

What force causes moons to stay in orbit around their planets?

a)

Gravity

b)

Magnetism

c)

Heat

d)

Light

97.

Which of these objects would have the weakest gravitational force?

a)

Asteroid

b)

Star

c)

Planet

d)

Moon

98.

What would happen to a planet's moons if the planet suddenly disappeared?

a)

They would drift away into space

b)

They would orbit the Sun

c)

They would crash into each other

d)

They would stop moving

99.

Which of these objects relies most on gravity to keep its orbit?

a)

Cloud

b)

Mountain

c)

River

d)

Satellite

100.

What is the effect of increasing the mass of a planet on its gravitational pull?

a)

Gravitational pull decreases

b)

Gravitational pull stays the same

c)

Gravitational pull increases

d)

Gravitational pull disappears

101.

What would happen to Earth's orbit if the Sun's mass increased?

a)

Earth would stop orbiting

b)

Earth would orbit faster

c)

Earth would move farther away

d)

Earth would float away

102.

Which factor does NOT affect the strength of gravity between two objects?

a)

Size of objects

b)

Distance between objects

c)

Mass of objects

d)

Color of objects

103.

Why do astronauts feel weightless while orbiting Earth?

a)

Earth's gravity is reversed

b)

They are too far from Earth

c)

There is no gravity in space

d)

They are in free fall around Earth

104.

What keeps planets moving in their orbits around the Sun?

a)

Electricity

b)

Gravity and forward motion

c)

Magnetism

d)

Heat

105.

What would happen to Earth's Moon if Earth's gravity suddenly disappeared?

a)

The Moon would drift away into space

b)

The Moon would crash into Earth

c)

The Moon would become a planet

d)

The Moon would stop moving

106.

Why does a planet with more mass have a stronger gravitational pull?

a)

It rotates faster

b)

It has more matter

c)

It is closer to the Sun

d)

It is colder

107.

What would happen to a planet if it lost most of its mass?

a)

It would attract more moons

b)

Its orbit would speed up

c)

Its gravity would weaken

d)

It would move closer to the Sun

108.

Which force keeps satellites in orbit around Earth?

a)

Friction

b)

Wind

c)

Gravity

d)

Magnetism

109.

What would happen if the Sun's gravity suddenly disappeared?

a)

Planets would crash into each other

b)

Planets would drift away into space

c)

Planets would stop spinning

d)

Planets would orbit faster

110.

What would happen to Earth's orbit if the Sun lost a significant amount of mass?

a)

Earth would move farther away from the Sun

b)

Earth would orbit faster and closer

c)

Earth would stop orbiting

d)

Earth would crash into the Sun

111.

Which force is responsible for keeping artificial satellites in orbit around Earth?

a)

Magnetism

b)

Electricity

c)

Gravity

d)

Wind

112.

What would happen to a moon if its planet's gravity became much weaker?

a)

It would become a planet

b)

It would crash into the planet

c)

It would orbit faster

d)

It would drift away into space

113.

What causes planets to have different numbers of moons?

a)

Their mass and gravity

b)

Their distance from the Sun

c)

Their temperature

d)

Their color

114.

Which of the following objects can have an orbit?

a)

Only stars

b)

Any object with mass

c)

Only moons

d)

Only planets

115.

What would happen to a satellite if Earth's gravity became weaker?

a)

It would fall to Earth

b)

It would orbit faster

c)

It would drift away into space

d)

It would stop moving

116.

Which factor would make a planet's gravity weaker?

a)

Moving it closer to the Sun

b)

Changing its color

c)

Increasing its temperature

d)

Decreasing its mass

117.

What keeps satellites in orbit around Earth?

a)

Gravity

b)

Wind

c)

Light

d)

Sound

118.

Which planet would you weigh the most on?

a)

Jupiter

b)

Mars

c)

Earth

d)

Venus

119.

Which force is responsible for keeping the planets in orbit around the Sun?

a)

Gravity

b)

Magnetism

c)

Electricity

d)

Friction

120.

What would happen to a planet if the Sun's gravity became stronger?

a)

The planet would become a star

b)

The planet would stop moving

c)

The planet would orbit faster and closer

d)

The planet would move farther away

121.

Which planet has weaker gravity than Earth?

a)

Mars

b)

Saturn

c)

Neptune

d)

Jupiter

122.

What keeps planets from flying away from the Sun?

a)

Gravity

b)

Wind

c)

Light

d)

Heat

123.

Which planet would objects feel the heaviest on?

a)

Jupiter

b)

Mars

c)

Venus

d)

Earth

124.

What is the main reason moons orbit planets?

a)

Size

b)

Color

c)

Temperature

d)

Gravity

125.

What would happen to a planet if gravity did not exist?

a)

It would orbit the Sun faster

b)

It would spin slower

c)

It would become heavier

d)

It would float away in a straight line

126.

Which of these objects is held in orbit by Earth's gravity?

a)

The Moon

b)

The Sun

c)

Jupiter

d)

Mars

127.

What is the main reason satellites stay in orbit around planets?

a)

Heat

b)

Friction

c)

Electricity

d)

Gravity

128.

What causes planets to move in curved paths around the Sun?

a)

Light

b)

Gravity and their forward motion

c)

Magnetism

d)

Heat

129.

Which factor would decrease the gravitational pull between two objects?

a)

Decreasing their temperature

b)

Decreasing their speed

c)

Increasing their mass

d)

Increasing the distance between them

130.

What keeps artificial satellites in orbit around Earth?

a)

Light

b)

Magnetism

c)

Wind

d)

Gravity

131.

Which of the following objects would experience the strongest gravitational force from the Sun?

a)

Jupiter

b)

Pluto

c)

Earth

d)

Mercury

132.

What is the main factor that determines the strength of gravity between two objects?

a)

Shape

b)

Mass

c)

Color

d)

Temperature

133.

Which of the following would happen if a planet moved closer to the Sun?

a)

It would lose its moons

b)

Its mass would decrease

c)

Its gravitational pull from the Sun would increase

d)

Its orbit would slow down

134.

What would happen to a planet's gravity if its mass increased?

a)

Its gravity would stay the same

b)

It would lose its moons

c)

Its gravity would become weaker

d)

Its gravity would become stronger

135.

Which force is responsible for keeping planets in orbit around the Sun?

a)

Friction

b)

Magnetism

c)

Gravity

d)

Electricity

136.

What would happen to the Moon if Earth's gravity suddenly disappeared?

a)

The Moon would orbit faster

b)

The Moon would drift away into space

c)

The Moon would stop moving

d)

The Moon would crash into Earth

137.

What would happen to a planet's orbit if its mass increased significantly?

a)

It would move farther from the Sun

b)

Its orbit would remain unchanged

c)

It would move closer to the Sun

d)

It would stop orbiting

138.

Which of the following objects has the weakest gravitational force?

a)

Sun

b)

Neptune

c)

Earth

d)

Comet

139.

What is the main reason planets stay in orbit around the Sun?

a)

Light

b)

Wind

c)

Magnetism

d)

Gravity

140.

Which planet in our solar system has the strongest gravitational pull?

a)

Venus

b)

Jupiter

c)

Earth

d)

Mars

141.

What causes a planet to have more moons?

a)

Its speed

b)

Its temperature

c)

Its gravity

d)

Its color

142.

Why do planets stay in orbit around the Sun?

a)

Because of magnetism

b)

Because of their color

c)

Because of gravity and their forward motion

d)

Because of heat

143.

What would happen to a planet's orbit if its mass increased?

a)

It would move farther from the Sun

b)

Its gravity would increase

c)

It would stop orbiting

d)

It would lose its moons

144.

Which of these objects is held in orbit by Earth's gravity?

a)

The Sun

b)

Mars

c)

Jupiter

d)

The Moon

145.

What is the main reason why smaller planets have fewer moons?

a)

They are colder

b)

They are closer to the Sun

c)

They have weaker gravity

d)

They spin faster

146.

Which force keeps planets in orbit around the Sun?

a)

Gravity

b)

Magnetism

c)

Friction

d)

Electricity

147.

What would happen to an artificial satellite if Earth's gravity stopped acting on it?

a)

It would become heavier

b)

It would orbit faster

c)

It would drift away into space

d)

It would fall to Earth

148.

Why does Jupiter have more moons than Mercury?

a)

Mercury spins faster

b)

Mercury is colder

c)

Jupiter is closer to the Sun

d)

Jupiter is larger and has stronger gravity

149.

Which factor most affects the strength of gravity between two objects in space?

a)

Their temperature

b)

Their shape

c)

Their mass

d)

Their color

150.

Why does Jupiter have more moons than Earth?

a)

It is closer to the Sun

b)

It is colder

c)

It has a stronger gravitational pull

d)

It spins faster

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