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Worksheets8th Grade Science Final Review
Total questions: 40
Worksheet time: 27mins
Name
Class
Date
1.
A substance that is made up of only one kind of atom is a(an)
a)
compound
b)
homogeneuous
c)
element
2.
If a material contains two elements chemically joined in a fixed proportion, it is a(an)
a)
atom
b)
solution
c)
compound
3.
Which of the following is a heterogeneous mixture?
a)
water
b)
solution
c)
jar of mixed nuts
4.
Which of the following is a chemical change?
a)
sawing a piece of wood in half
b)
burning a piece of wood
c)
water boiling
5.
Which of the following is not a physical change
a)
water breaking down into hydrogen and oxygen
b)
ice being crushed
c)
water boiling
6.
A gas has
a)
definite volume and indefinite shape.
b)
definite shape and indefinite volume
c)
indefinite shape and indefinite volume.
7.
Matter that has a definite volume and indefinite shape is a
a)
liquid
b)
solid
c)
gas
8.
Which subatomic particle has a negative charge?
a)
electron
b)
neutron
c)
proton
9.
The energy of motion is called
a)
kinetic
b)
potential
c)
thermal
10.
Which of the following statements is true according to the law of conservation of energy?
a)
energy cannot be created
b)
energy cannot be destroyed
c)
all of the above
11.
Energy stored in the sun is
a)
nuclear
b)
motion
c)
electrical
12.
Which of the following is a renewable resource
a)
solar
b)
natural gas
c)
coal
13.
Newton's first law says that an object in motion will remain in motion because of
a)
inertia
b)
friction
c)
gravity
14.
Which state of matter has the highest amount of kinetic energy
a)
solid
b)
liquid
c)
gas
15.
Which of Newton's laws of motion is also known as the action-reaction law
a)
Newton's 1st
b)
Newton's 2nd
c)
Newton's 3rd
16.
Which of Newton's laws of motion explains why a greater force acclerates a soccer ball farther than a smaller force
a)
Newton's 1st
b)
Newton's 2nd
c)
Newton's 3rd
17.
What simple machine is helping Tom move the soil?
a)
screw
b)
wheel & axle
c)
wedge
d)
lever
18.
Structural differences between different chemicals can be represented in models of the particles. Which drawingbest represents a compound?
a)
A
b)
B
c)
C
d)
D
19.
Bob and his dad are building a tree house. Which machine will help them lift the materials up into the tree?
a)
lever
b)
pulley
c)
wedge
d)
wheel
20.
If you had two coal trucks of the same size, one was empty and one was full. Which one would cause the most force to stop from rolling down a hill?
a)
A. The empty coal truck requires more force to stop.
b)
B. The full coal truck requires more force to stop.
c)
. C. They both require the same amout of force to stop
d)
D. None of the above
21.
Which is an example of a physical property?
a)
rusting
b)
boiling point
c)
combustion
d)
reactivity with water
22.
What characteristic defines all chemical changes?
a)
There is a change of state.
b)
Electricity is produced.
c)
A new material is formed.
d)
Bubbles are produced.
23.
Which statement best describes why the pencil looks bent in the picture?
a)
Light from the air is entering a different medium
b)
Gravity affects the light more in a different medium
c)
The farther light is from its source, the slower it moves.
d)
The pencil only looks bent at certain angles
24.
Sound travels as a
a)
A pattern of up and down vibrations
b)
A series of compressions and rarefactions
c)
A series of compressions only
d)
A wave without a medium
25.
The top, as of a wave.
a)
crest
b)
frequency
c)
wavelength
d)
amplitude
26.
Parts of a magnet where the magnetic effects are strongest
a)
Magnetic field
b)
Poles
c)
Magnetite
d)
Solenoid
27.
What two components influence gravity?
a)
mass and distance
b)
mass and weight
c)
mass and volume
d)
density and pressure
28.
What is the measure of average kinetic energies of the particles within an object?
a)
temperature
b)
heat
c)
thermal energy
d)
potential energy
29.
Atoms are composed of
a)
Protons
b)
Neutrons
c)
Electrons
d)
All the above
30.
There are three forms of heat transfer. Which one travels from the Sun to the Earth?
a)
Conduction
b)
Convection
c)
Radiation
d)
Heat doesn't travel from the Sun
31.
You learned about different energy transformations. What is the most common energy used in your house?
a)
nuclear
b)
mechanical
c)
chemical
d)
electrical
32.
Which is an insulator?
a)
wooden spoon
b)
silver spoon
c)
steel spoon
d)
aluminum foil
33.
Which is a conductor?
a)
wool sweater
b)
aluminum foil
c)
oven mitt
d)
wooden spoon
34.
Which kind of energy change occurs when a candle is burning?
a)
Chemical to light
b)
Light to electrical
c)
Solar to heat
d)
Chemical to electrical
35.
Electrical -> Mechanical -> Sound
a)
A triple beam balance measuring an object’s mass
b)
A pencil sharpener plugged into a wall outlet
c)
A projector displaying a diagram on the screen
d)
A working flashlight used to light up a dark corner
36.
Which of these is an example of light energy being transformed into chemical energy?
a)
A glow stick lights up when broken.
b)
Water heated by the sun evaporates.
c)
A plant makes sugar in the sunlight.
d)
A battery causes a buzzer to vibrate.
37.
In this example, electrical Energy is transferred to _____ Energy.
a)
Mechanical
b)
Solar
c)
Electrical
d)
Thermal
38.
Energy is the ability _____________.
a)
to do work
b)
to power things
c)
to move objects
d)
to turn on a light
39.
Which of the following best describes the energy transfer that takes place when you use a battery?
a)
Chemical PE -> Electrical
b)
Electrical -> Chemical PE
c)
Nuclear PE -> Electrical
d)
Electrical -> Nuclear PE
40.
Energy can be created.
a)
True
b)
False
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