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Solar System, Systems, and Energy Forces

True/False
Indicate whether the statement is true or false.
 

 1. 

Gravity pulls an object down an incline plane.
 

 2. 

Our Moon rotates around the Earth.
 

 3. 

The weight of an object is determined by the gravitational pull on the mass of the object.
 

 4. 

The Moon’s gravity is stronger than the Earth gravity.
 

 5. 

Heat travels through empty space to reach our planet Earth.
 

 6. 

The Moon is smaller than the Earth.
 

 7. 

The mass of an object changes when you travel from the Earth to the Moon.
 

 8. 

All objects have gravity.
 

 9. 

A hammer is not a simple machine.
 

 10. 

The Moon is the only reason ocean tides occur on Earth.
 

 11. 

The Moon has an atmosphere.
 

 12. 

The planets produce their own light.
 

 13. 

The Sun’s gravitational force keeps the Earth shaped like a round ball.
 

 14. 

All objects have inertia.
 

 15. 

The two forces that keep our Solar System in it shape are gravity and inertia.
 

Multiple Choice
Identify the choice that best completes the statement or answers the question.
 

 16. 

How many planets in our Solar System are gas planets?
a.
4
c.
7
b.
9
d.
5
 

 17. 

Which word is used to describe how the Earth spins on its axis?
a.
revolve
c.
rotate
b.
orbit
d.
turn
 

 18. 

How many planets in our solar system are terrestrial planets?
a.
4
c.
9
b.
7
d.
5
 

 19. 

Our Sun is made of:
a.
rock
c.
stone
b.
gas
d.
dirt
 

 20. 

Which of these objects is considered an simple machine?
a.
pulley
c.
tractor
b.
car
d.
roller coaster
 
 
nar001-1.jpg
 

 21. 

Which word describes what the moon is doing in the picture above?
a.
revolves around the Earth
c.
rotates around the Earth
b.
spins around the Earth
d.
turns around the Earth
 

 22. 

Which planet is closest to the Sun?
a.
Venus
c.
Earth
b.
Mercury
d.
Neptune
 

 23. 

Which of these would be a model of how the Sun’s energy warms the Earth?
a.
a pot of boiling water
c.
a oven baking bread
b.
a microwave keeping food hot
d.
a spoon getting hot when stirring soup
 

 24. 

What force comes from the Sun and keeps our Solar System in its shape?
a.
gravity
c.
pressure
b.
inertia
d.
solar
 
 
nar002-1.jpg
 

 25. 

What energy causes the object above to make a noise?
a.
it is vibrating
c.
it is growing
b.
it is moving
d.
none of these
 

 26. 

How long does it take the Earth to revolve around the Sun one time?
a.
24 hours
c.
12 hours
b.
7 days
d.
365 days
 

 27. 

How much of the Earth is in darkness (night) and how much is in daylight (day)?
a.
1/3 each side
c.
all
b.
1/4 each side
d.
1/2 each side
 

 28. 

Which word describe the path the Earth takes when it travels around the Sun one time?
a.
revolves
c.
turns
b.
rotates
d.
spins
 

 29. 

How many times do ocean tides occur on Earth?
a.
5 times
c.
twice
b.
3 times
d.
8 times
 

 30. 

If a rock is taken from the Earth to the surface of the Moon what is different about the rock?
a.
the rock changed shape
c.
the rock changed its mass
b.
the rock changed color
d.
the rocks weight changed
 

 31. 

Which of these causes day and night on Earth?
a.
the Sun revolving around the Earth
c.
the Earth rotating on its axis
b.
the Moon revolving around the Earth
d.
the Earth revolving around the Sun
 

 32. 

How long does it take the Earth to rotate on its axis one time.
a.
48 hours
c.
12 hours
b.
24 hours
d.
365 hours
 

 33. 

The surface of the Sun is made of:
a.
liquid
c.
gas
b.
rock
d.
solids
 

 34. 

What force keeps an object moving in a straight line?
a.
gravity
c.
inertia
b.
pressure
d.
solar
 

 35. 

Which of these are the mediums sound and heat must travel through?
a.
earth, wind, fire
c.
solid, liquid, gas
b.
water, space, liquids
d.
space, rain, rocks
 

Matching
 
 
a.
inertia
e.
revolve
b.
weight
f.
gravity
c.
mass
g.
gasses
d.
rotate
h.
terrestrial
 

 36. 

the substance that the sun is made of
 

 37. 

a word that describes the path the Earth takes around the Sun
 

 38. 

a force that keeps an object moving in a straight line
 

 39. 

determined by the mass of an object.
 

 40. 

a word that describes planets that are made of dirt, rock, and ice.
 

 41. 

a force that pull on object towards the center of another object
 

 42. 

a word that describes the Earth spinning on its axis
 

 43. 

the amount of matter an object contains
 



 
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