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WorksheetsScience 8 Final Review
Total questions: 23
Worksheet time: 6hrs 45mins
Name
Class
Date
1.
How many days for 1 lunar cycle?
a)
10
b)
20
c)
30
d)
40
2.
In summer, the axis of the earth is pointed away or toward the sun?
a)
towards
b)
up
c)
down
d)
away
3.
Which season is taking place in the Northern Hemisphere in Position 1?
a)
Winter
b)
Spring
c)
Summer
d)
Fall
4.
The Moon ________ around the Earth.
a)
moves parallel
b)
rotates
c)
moves perpendicular
d)
revolves
5.
Day and night is caused by the _____________ of earth on its axis.
a)
revolution
b)
orbit
c)
rotation
6.
How long does it take the Earth to make one REVOLUTION around the Sun?
a)
12 hours
b)
24 hours
c)
365 days
d)
29.5 days
7.
How long does Earth take to make a complete rotation?
a)
365 days
b)
24 hours
8.
______ is a force that causes dust particles to stick together in a nebula.
a)
nuclear fusion
b)
gravity
c)
hydrogen
d)
iron
9.
After a supernova of what used to be a blue star with a very large mass, what is left?
a)
white dwarf star
b)
black dwarf star
c)
black hole
d)
white hole
10.
Why are black holes black?
a)
No light can escape the black hole's gravity
b)
No light is reflected from the closest stars
c)
They are transparent, so you see space
d)
Plants around it prevent light from hitting the black hole.
11.
Gravity attracts all objects towards one another.
a)
False
b)
True
c)
It depends
12.
Any object with mass has gravity.
a)
True
b)
Sometimes
c)
False
d)
Never
13.
As distance between two objects increase the pull of gravity
a)
Increases
b)
Decreases
c)
Stays the same
14.
The force of gravity acting on an object is the object's ______.
a)
mass
b)
matter
c)
weight
d)
friction
15.
The amount of matter in an object is
a)
pressure
b)
weight
c)
mass
d)
force
16.
Which of the following never changes no matter where in the universe?
a)
weight
b)
force
c)
mass
d)
pounds
17.
What is Newton's First Law
a)
F=ma
b)
Every action has an equal and opposite reaction
c)
An object at rest stays at rest, an object in motion stays in motion.
d)
Friction
18.
A(n) __________ is a push or pull.
a)
newton
b)
acceleration
c)
force
d)
momentum
19.
What law of motion does this picture represent?
a)
Newtons 1st law
b)
Newtons 4th law
c)
Newtons 3rd law
d)
Newtons 2nd law
20.
What law describes what happens if you are riding a skateboard and hit something (like a rock) with the front wheels.
a)
Newtons 3rd law
b)
Newtons 1st law
c)
Law of gravity
d)
Law of movement
21.
What law of motion does this picture represent
a)
Newtons law of gravity
b)
Newtons 1st law
c)
Newtons 4th law
d)
Newtons 3rd law
22.
Newton's third law states that any action will have a(n) _______ and ______ reaction
a)
Equal and similar
b)
Equal and opposite
c)
Equal and different
d)
Greater and opposite
23.
A person steps out of the boat and onto the dock. As the person moves forward onto the dock, the boat moves backward. Which statement best describes the backward motion of the boat as the person steps forward?
a)
For every action there is an equal and opposite reaction.
b)
Every mass exerts a force on every other mass.
c)
An object at rest tends to stay at rest.
d)
Friction opposes the motion of an object.
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