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Science 8 Review

Total questions: 40

Worksheet time: 28mins

Name
Class
Date
1.
How has the mass changed after the phase change?
a)
It is the same
b)
It has increased
c)
It has decreased
d)
none of the above
2.
Composed of all the water on or near the earth
a)
Hydrosphere 
b)
Biosphere 
c)
Atmosphere 
d)
Geosphere 
3.
A ____ is a scientific model with properties of elements.
a)
punnett square
b)
compound diagram
c)
periodic table
d)
dichotomous key
4.
Shredded paper is an example of a _____ change.
a)

physical

b)
chemical
5.
A burned piece of wood & ashes is an example of a _____.
a)
physical change
b)
chemical change
6.
Rust forming on a piece of metal is an example of a _____.
a)
physical change
b)
chemical change
7.
Which of the following is a compound?
a)
CO2
b)
Au
c)
N
d)
O
8.
A push or a pull that can move an object is a __________.
a)
gear
b)
lever
c)
force
d)
machine
9.
Which type of energy does the battery produce?
a)
sound
b)
light
c)
mechanical
d)
electrical
10.

What does this graph show?

a)

As hours increase, temperature increases.

b)

As hours increase, temperature decreases.

c)

As hours decrease, temperature increases.

d)

There is no relationship in this graph.

11.
When you stretch a rubber band, you are storing __________ energy. 
a)
kinetic 
b)
potential
c)
none of the above
d)
all of the above 
12.
which point has the most potential energy
a)
G
b)
f
c)
b
d)
a
13.
What kind of energy is in a rock at the edge of a cliff?
a)
Potential
b)
Kinetic
14.
What kind of energy is in a moving skateboard?
a)
Potential
b)
Kinetic
15.
A basketball is being held in the hands of a player.
a)
Potential
b)
Kinetic
16.

Water

a)

Renewable energy source

b)

Nonrenewable energy source

17.

Coal

a)

Renewable energy source

b)

Nonrenewable energy source

18.

Nuclear

a)

Renewable energy source

b)

Nonrenewable energy source

19.

Wind

a)

Renewable energy

b)

Nonrenewable energy source

20.

Petroleum

a)

Renewable energy source

b)

Nonrenewable energy source

21.

Wood

a)

Renewable

b)

Nonrenwable

22.

A NONRENEWABLE energy resource formed from the remains of organisms that lived long ago.

a)

Biomass

b)

Fossil fuels

c)

Hydroelectric of them

d)

all of them

23.
How long a wave is
a)
crest
b)
trough
c)
electromagnetic spectrum
d)
wavelength
24.
The top of a wave
a)
crest
b)
trough
c)
electromagnetic spectrum
d)
wavelength
25.
Longest wavelength; TV, cell phones, MRI
a)
radio waves
b)
ultraviolet
c)
microwaves
d)
gamma rays
26.
Black light; too much causes cancer
a)
radio waves
b)
ultraviolet
c)
microwaves
d)
gamma rays
27.
Long wavelengths; bluetooth, radar, broadband, GPS
a)
radio waves
b)
ultraviolet
c)
microwaves
d)
gamma rays
28.
The part of the electromagnetic spectrum that we can see
a)
microwaves
b)
visible light
c)
gamma rays
d)
infrared
29.
Short, high energy rays used to see through things
a)
gamma rays
b)
X rays
c)
microwaves
d)
infrared
30.
What is energy?
a)
the ability to do nothing
b)
the ability to change a tire
c)
the ability to do work
d)
the variable you change
31.
What kind of energy is represented in this picture?
a)
Thermal
b)
Potential
c)
Nuclear
d)
Mechanical
32.
What kind of energy does this device use?
a)
Chemical
b)
Electrical
c)
Thermal
d)
Chemical
33.
What kind of energy is represented in the picture?
a)
Thermal
b)
Chemical
c)
Sound
d)
Nuclear
34.
Work is:
a)
A transfer of energy by a force to move and object
b)
Something you get paid for
c)
Something you take home
d)
Makes you sweat
35.
According to the Law of Conservation of Energy, energy cannot be _________ or ____________. 
a)
destroyed, destroyed
b)
created, saved
c)
created, destroyed
d)
lost, found
36.

Which graph shows an object speeding up?

a)

1

b)

2

c)

3

d)

4

37.
When all the forces on an object are equal and opposite, & the net force is zero, that's...
a)
balanced forces
b)
unbalanced forces
c)
terminal velocity
d)
reaction forces
38.

When an unbalanced force acts on an object, the force ______________________.

a)

changes the motion of the object

b)

is cancelled by another force

c)

does not change the motion of an object

d)

is equal to the weight of the object

39.
A magician pulls a tablecloth out from under dishes and glasses on a table without disturbing them.
a)
Newton's 1st Law
b)
Newton's 2nd Law
c)
Newton's 3rd Law
40.
This person bought coffee and put it on the seat next to them. If they stopped quickly and the coffee spilled which law would that represent?
a)
Newton's 1st Law
b)
Newton's 2nd Law
c)
Newton's 3rd Law

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