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Space Systems

Total questions: 76

Worksheet time: 1hrs 5mins

Name
Class
Date
1.

A satellite is orbiting around Earth. What would happen if Earth's gravity suddenly disappeared?

a)

The satellite would move into space in a straight line.

b)

The satellite would continue to orbit Earth.

c)

The satellite would stop moving.

2.

What is responsible for keeping planets in orbit around the sun?

a)

density

b)

gravity

c)

photosynthesis

3.

The planets orbit around the sun because the sun has the greatest ____________.

a)

weight

b)

diameter

c)

mass

4.

What keeps the moon in orbit around Earth?

a)

tension

b)

magnetism

c)

gravity

5.

The attractive force between objects is called....

a)

force

b)

Gravity

c)

inertia

d)

motion

6.

The ............ of 2 objects and their distance from each other determine the gravitational force between them

a)

GRAVITY

b)

MASS

c)

INERTIA

7.

WHAT 2 FACTORS affect the force of gravity?

a)

Mass and inertia

b)

Mass and Distance

c)

Distance and Inertia

d)

Mass and Gravity

8.

As the mass of interacting objects increases, gravity.....

a)

increases

b)

decreases

9.

As the mass of interacting objects decreases, gravity.....

a)

increases

b)

decreases

10.

As the distance of interacting objects increases, gravity.....

a)

increases

b)

decreases

11.

The greater the pull of gravity on an object, the greater the ............. of that object.

a)

mass

b)

weight

c)

gravity

12.
Complete the following statement: The farther away two planets are the _______ the gravitational force between them.
a)
more
b)
same
c)
dosen't matter
d)
less
13.

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

14.

Which of the following is required for planets to stay in orbit around the Sun? (choose all that apply)

a)

Gravity

b)

Weight

c)

Friction

d)

Forward Motion

15.

What prevents planets from pulled into and crash into the Sun?

a)

Gravity

b)

Weight

c)

Friction

d)

Inertia

16.

What prevents planets from drifting off into space and keeps it in the planets in our Solar System?

a)

Gravity

b)

Weight

c)

Friction

d)

Forward Motion

17.
TRUE or FALSE: The larger a body (planet), the greater its gravitational pull.
a)
True 
b)
False
18.
TRUE or FALSE: The sun is the most massive object in the solar system.
a)
True 
b)
False
19.

What motion is responsible for day and night

a)

The rotation of Earth

b)

The rotation of the moon

c)

The revolution of Earth around the sun.

d)

The revolution of the moon around the Earth

20.

What is the difference between rotation and revolution?

a)

Rotation is the Earth turning on its axis. Revolution is the Earth circling around the Sun.

b)

Rotation is the Earth circling around the Sun and revolution is the Earth turning on its axis.

c)

There is no difference and they are the same.

21.

What is gravity?

a)

A type of energy.

b)

A force that causes objects to repel each other.

c)

A force that causes objects to attract each other.

d)

A large celestial object, such as a planet or a star

22.

The sun's gravity helps

a)

keep the moon in orbit around the Earth

b)

keep the Earth in orbit around the Sun

c)

to shape the Earth as a sphere

d)

to control the tides on Earth

23.

Which statement below is NOT true?

a)

The Earth's gravity keeps the moon in orbit around the Earth

b)

The moon exerts gravity

c)

The moon's gravity pulls on Earth's ocean waters

d)

The moon's gravity keeps the Earth in orbit around the Sun.

24.

Which object exerts the greatest gravitational force

a)

The Sun

b)

The Earth

c)

The moon

d)

Pluto

25.

Which object exerts the weakest gravitational force?

a)

The Sun

b)

The Earth

c)

The moon

26.
A[n] ______________ tide occurs when the sun is at right angles to the line between Earth and the moon. 
a)
high
b)
neap
c)
low
d)
spring
27.
Differences in the moon's and sun's pull on different sides of the Earth cause _________.
a)
gravity
b)
lunar phases
c)
tides
d)
dabbing
28.
A[n] ___________ tide occurs when the sun, Earth, and the moon are nearly in a line. 
a)
spring
b)
high
c)
low
d)
neap
29.
The bulge of water on the side of the Earth closest to the moon produces ___________.
a)
high tide
b)
low tide
c)
neap tide
d)
spring tide
30.
Tides are caused mainly by the differences in how much gravity from the moon and the sun pulls on different parts of the Earth. 
a)
True
b)
False
31.
Changes in the positions of Earth, the moon, and the sun affect the height of high tides during a month. 
a)
True
b)
False
32.
What is a difference between spring and neap tides?
a)
Spring tides occur when the earth and sun are IN LINE with the new or full moon. 
b)
Spring tides occur when moon in 3rd or 1st quarter phases
c)
Spring tides are LOWER than neap tides
d)
Spring tides occur in Spring and neap tides can occur in any season
33.
What type of tides would this arrangement of earth-moon-sun create?
a)
neap tide
b)
spring tide
c)
new moon tide
d)
full moon tide
34.
What type of tide would this arrangement of earth-moon-sun create?
a)
full moon tide
b)
new moon tide
c)
neap tide
d)
spring tide
35.
What causes tides?
a)
gravity
b)
wind
c)
spring
d)
neap
36.

What is a high tide?

a)

Sea pulled TOWARD the moon where Earth is CLOSEST to the moon

b)

Sea pulled AWAY from the moon where Earth is FARTHEST to the moon

c)

Sea pulled AWAY from the moon where Earth is CLOSEST to the moon

37.
The Moon has a greater influence on Earth tides than the Sun because...
a)
it is smaller than the Sun
b)
it revolves around the Earth
c)
it is closer to the Earth
38.

The moon is mainly responsible for the tides on Earth because it is _________ _________.

a)

much closer

b)

far away

c)

behind the sun

39.
Tides are caused by
a)
strong winds that blow over ocean waters.
b)
the interaction of Earth, the moon and the sun.
c)
the shifting of the plates on the ocean floor.
d)
variations in the salinity of ocean water
40.
If tides alternate from high to low and there are two of each type of tide a day, about how many hours will generally be between each different tide?
a)
2 hours
b)
6 hours
c)
12 hours
d)
24 hours
41.
How many low tides and high tides happen in a day?
a)
1 low tide, 1 high tide
b)
4 low tides, 4 high tides
c)
3 low tides, 3 high tides
d)
2 low tides, 2 high tides
42.
You visited the beach at 12 pm (noon) and it is high tide. If you return 6 hours later what tide will you see? 
a)
high 
b)
low 
c)
none
d)
spring 
43.
What is a difference between spring and neap tides?
a)
Spring tides occur when the earth and sun are IN LINE with the new or full moon. 
b)
Spring tides occur when moon in 3rd or 1st quarter phases
c)
Spring tides are LOWER than neap tides
d)
Spring tides occur in Spring and neap tides can occur in any season
44.

Weight is _________.

a)

the quantity of matter in an object.

b)

the measure of an object's inertia.

c)

the force exerted by gravity on an object's mass.

d)

equal to the mass of an object.

45.

Weight is constant.

a)

True

b)

False

46.
The force of gravity acting on an object is the object's ______.
a)
mass
b)
matter
c)
weight 
d)
friction 
47.
The amount of matter in an object is 
a)
pressure
b)
weight
c)
mass
d)
force
48.
The scientific unit of weight is
a)
Kg
b)
N
c)
pounds
d)
Kgm/s
49.
The scientific unit for mass is
a)
Kg
b)
N
c)
pounds
d)
ounces
50.
A person would weigh less on on the Moon than on the Earth because . . .
a)
Moon has more mass, and therefore more gravity
b)
Moon has less mass, and therefore more gravity
c)
Moon has more mass, and therefore less gravity
d)
Moon has less mass and therefore less gravity
51.
What is gravity?
a)
A force
b)
Energy
c)
A push
d)
All of them
52.
Without gravity we would________. 
a)
Float away
b)
Stay in the ground
c)
Nothing would happen.
d)
I don't know
53.
Which has more mass, Earth or the Moon?
a)
Earth
b)
Moon
c)
The same
54.
A child has a mass of 30 Kg on Earth. If the gravity on Moon is one sixth that of the Earth what is the mass of the child on Moon? 
a)
30 Kg
b)
180 Kg
c)
5 Kg
d)
0 Kg
55.
If the mass of an object is 1000 kg on Earth, what is it's mass on the moon?
a)
10kg
b)
100kg
c)
1000kg
d)
10,000kg
56.

What is missing

a)

H

b)

m

c)

D

d)

n

57.

What is missing

a)

g

b)

D

c)

L

d)

n

58.

What is missing?

a)

D

b)

N

c)

W

d)

L

59.
Which planet in our solar system is closest to the Sun?
a)
Earth
b)
Jupiter
c)
Mercury
d)
Saturn
60.

How do the sizes of the inner planets (4 closest to the sun) compare to the sizes of the outer planets (4 farthest from the sun)?

a)

The inner planets are larger.

b)

The outer planets are smaller.

c)

There is no size difference between the inner and outer planets.

d)

The inner planets are smaller.

61.

This model shows...

a)

the size differences among the planets accurately.

b)

the distances between the planets accurately.

c)

both the sizes of the planets and the distances between them accurately

62.

What is the center of our solar system?

a)

The sun

b)

Uranus

c)

Jupiter

d)

Saturn

63.

Why do scientists use scale models to study the Solar System?

a)

The solar system is too large to study without using models

b)

The solar system is too small to study without using models

c)

Scientists don't need to use models because we have satellites

d)

All of these options are true

64.

Why is making a model of the solar system difficult?

a)

Don't have the right materials

b)

The solar system is so big and the objects in it are so small in comparison

c)

There are too many parts in a model

d)

Because the science concepts are too difficult

65.

Which planet in the Solar system orbits the sun in the shortest amount of time?

a)

Mercury

b)

Earth

c)

Jupiter

d)

Neptune

66.

If you were going to make a scale model of the Solar system what planet should be the second largest?

a)

Jupiter

b)

Saturn

c)

Earth

d)

Uranus

67.

What planet is spinning the fastest on its axis?

a)

Mercury

b)

Jupiter

c)

Venus

d)

Earth

68.

What planets year (Period of Revolution) is shorter than its day (Period of Rotation)?

a)

Venus

b)

Jupiter

c)

Earth

d)

Uranus

69.
The Sun is the nearest star to Earth.
a)
True
b)
False
70.
the regular, curved path in which Earth moves 
a)
light-year
b)
orbit
c)
lunar eclipse
d)
Astronomical Unit (AU)
71.
All of the planets in our solar system orbit around the Sun.  
a)
True
b)
False
72.
True or False
The planets are all equally distanced from each other.
a)
True
b)
False
73.
A light year is the 
a)
distance that light travels in one year
b)
Speed at which light travels 
74.
The average distance between the earth and the sun is the 
a)
astronomical unit 
b)
Light year
75.

Why do we use light years and astronomical units to measure distances in space?

a)

Scientists want to sound smart.

b)

Hubble discovered these units and wanted to use them.

c)

Space is too small to use km, it wouldn't make sense.

d)

Space is too big, vast, enormous to use traditional units, like miles.

76.

Which of the following scenarios would be appropriate to use light years?

a)

From the sun to Earth

b)

from Earth to Neptune

c)

from the Milky Way to its closest galaxy

d)

Asteroid Belt to the Kuiper Belt

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