WorksheetsOhio 8th Grade Physical Science Review
Total questions: 43
Worksheet time: 44mins
Name
Class
Date
1.
Motors and generators could not operate with out magnetism
a)
True
b)
False
2.
What will happen when these magnets are brought close together?
a)
They will attract each other.
b)
They will repel each other.
c)
Both magnets will turn to the left
d)
Both magnets will turn to the right
3.
Surrounding every magnet is a __________ __________.
a)
magnetic field
b)
electrical current
c)
another magnet
d)
an enemy
4.
What device is made of coils of wire with an electrical current passing through it in order to generate a magnetic field?
a)
Electromagnet
b)
Generator
c)
Electron Magnet
d)
Motor
5.
Magnets that are arranged like this will _______.
a)
move away from each other (repel)
b)
move toward each other (attract)
6.
Magnets that are arranged like this will _______.
a)
move away from each other (repel)
b)
move towards each other (attract)
7.
Two factors effecting the magnitude of the force of gravity between 2 objects are...
a)
mass and distance
b)
mass and matter
c)
distance and weight
d)
weight and mass
8.
Gravity attracts all objects towards one another.
a)
False
b)
True
c)
It depends
9.
Every object in the universe attracts every other object.
a)
True
b)
False
10.
If Earth's mass was cut in half, what would happen to your weight?
a)
Increase because gravitational force increases
b)
decrease because gravitational force decreases
c)
decrease because gravitational force increases
d)
nothing, weight is not affected by gravitational force
11.
What does this tool measure?
a)
weight
b)
meters
c)
mass
d)
force
12.
Is the force of gravity on the diver a push or a pull?
a)
push
b)
pull
13.
Any object with mass has gravity.
a)
True
b)
Sometimes
c)
False
d)
Never
14.
As distance between two objects increase the pull of gravity
a)
Increases
b)
Decreases
c)
Stays the same
15.
What is the SI unit used to measure force?
a)
pounds
b)
grams
c)
newtons
d)
friction
16.
The amount of matter in an object is
a)
pressure
b)
weight
c)
mass
d)
force
17.
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
18.
A force of attraction between 2 object that is directly related to mass and indirectly related to distance.
a)
mass
b)
weight
c)
gravity
d)
kilogram
19.
As mass increases, what happens to gravitational force?
a)
increases
b)
decreases
c)
stays the same
d)
i don't know
20.
Which of the following will not change in different gravitational fields?
a)
wieght
b)
force
c)
mass
d)
pounds
21.
Which of the following will change with different gravitational forces?
a)
mass
b)
amount of matter in an object
c)
weight
d)
kilograms
22.
Ms Jo Jo rubbed two balloons with a piece of wool. What will happen when the balloons are brought near each other?
a)
The balloons will repel each other.
b)
The balloons will attract each other.
c)
The balloons will become positively (+) charged.
d)
The balloons will pop.
23.
Static charges build up when
a)
protons move within an object
b)
electrons move within an object
c)
neutrons move within an object
d)
the nucleus moves within an object
24.
Rubbing a balloon on hair is an example of static charge build up created by....
a)
conduction
b)
friction
c)
induction
d)
hairduction
25.
Static electricity is:
a)
electricity flowing in a wire
b)
the buildup of electric charges on an object
c)
when protons move between objects
26.
Elements that are shiny and good conductors of electricity are _____.
a)
colloids
b)
metalloids
c)
metals
d)
nonmetals
27.
Which of the following an insulator?
a)
copper
b)
wood
c)
silver
d)
salt water
28.
Lightning is _____.
a)
a buildup of neutrons
b)
harmless
c)
a high-voltage electric current
d)
a large discharge of static electricity
29.
The charge of an electron is:
a)
Positive.
b)
Negative.
c)
Electrons have no charge
30.
Two like charges:
a)
neutralize each other.
b)
repel each other.
c)
must be neutrons.
d)
attract each other.
31.
Protons are located in the nucleus of the atom.
A proton has _______________.
A proton has _______________.
a)
No charge
b)
A negative charge
c)
A positive charge
32.
What causes static electricity?
a)
only an object losing electrons
b)
only an object gaining electrons
c)
when positive and negative charges balance
d)
when positive and negative charges are not balanced
33.
What are the north and south ends of a magnet called?
a)
borders
b)
tips
c)
caps
d)
poles
34.
What happens when two north poles of a magnet are placed together?
a)
they repel
b)
they attract
c)
they cancel each other out
d)
the strength of the magnet is doubled
35.
True or False: All metals stick to magnets.
a)
True
b)
False
36.
Where is the force of attraction the strongest on a magnet?
a)
at the poles
b)
in the middle
c)
above the magnet
d)
below the magnet
37.
Which type of force(s) will cause a change in an object's motion?
a)
gravity
b)
zero net force
c)
balanced forces
d)
unbalanced forces
38.
friction is a force that acts
a)
in the same direction as the motion
b)
opposite to the direction of the motion
c)
opposite to the applied forces
d)
the same direction as the applied force
39.
In a tug of war the left team pulls with a force of 200N. The right team pulls with a force of 150N.What is the net force?
a)
50N to the left.
b)
350N to the left.
c)
350N to the right.
d)
50N to the right.
40.
Any change in an objects speed or direction
a)
Inertia
b)
Force
c)
Acceleration
d)
Reaction
41.
A balanced force has
a)
no net force
b)
some net force
c)
a wee bit of net force
d)
a lot of net force
42.
Balanced or Unbalanced?
a)
Balanced
b)
Unbalanced
43.
During which interval is the object speeding up?
a)
A to B
b)
B to C
c)
D to E
d)
E to F
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