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WorksheetsScience 8 Unit 3 Review
Total questions: 41
Worksheet time: 1hrs 22mins
An object’s KE + PE.
Mechanical
Sound
Thermal
Nuclear
An example is when a toaster turns electrical energy into heat.
Nuclear
Thermal
Potential
Elastic
Energy that is stored by stretching or compressing an object.
Elastic
Thermal
Nuclear
Kinetic
This kind of energy depends on the mass and speed of the object.
Kinetic
Potential
Thermal
Nuclear
This kind of energy is due to the motion of atoms.
Thermal
Potential
Nuclear
Elastic
This kind of energy comes from moving electrons and helps us power our appliances.
Electrical
Nuclear
Chemical
Elastic
Energy that is released when atomic nuclei collide or break apart.
Nuclear
Chemical
Elastic
Sound
Energy that is carried as waves, including light and x-rays.
Electromagnetic
Sound
Electrical
Nuclear
This kind of energy is from vibrating atoms and travels in waves.
Sound
Chemical
Mechanical
Elastic
This kind of energy is stored in the bonds that hold atoms together.
Chemical
Thermal
Mechanical
Nuclear
The Law of Conservation of Energy states that: energy cannot be __________________________ or
____________________, only ________________________________ from one type to another.
(a)
Which simple machine is shown in the picture?
lever
wedge
inclined plane
pulley
Which simple machine is shown in the picture?
lever
wedge
inclined plane
pulley
Which simple machine is shown in the picture?
wheel and axel
wedge
inclined plane
pulley
Which simple machine is shown in the picture?
wheel and axel
wedge
inclined plane
pulley
Which simple machine is shown in the picture?
wheel and axel
wedge
inclined plane
pulley
Which simple machine is shown in the picture?
wheel and axel
wedge
screw
pulley
A golf ball and a bowling ball are both rolling down the hallway at a speed of 10 m/s. Which has greater kinetic energy (KE)?
They both have the same KE because they have the same speed.
The golf ball because it has a smaller mass
The bowling ball because it has a larger mass
Neither have kinetic energy
The diagram below shows two people using a board and a log as a simple machine to lift a larger rock. What kind of simple machine is shown?
wheel and axel
screw
lever
inclined plane
The diagram below shows two people using a board and a log as a simple machine to lift a larger rock. What force must the people overcome in order to lift the rock?
magnetism
gravity
friction
tension
The diagram below shows two people using a board and a log as a simple machine to lift a larger rock. The people apply force to the lever to change the rock’s…
weight
size
position
mass
The diagram shows a person pushing a 50 kg box up a ramp. Which 2 simple machines are being used?
inclined plane; pulley
inclined plane; wheel and axle
lever; pulley
lever; wheel and axle
The unit of energy is the
Newton
Joule
Gram
Meter
The diagram shows two rocks on opposite cliffs (A on left, B on right). Which rock has the greater potential energy?
Rock A because it has lower height
Rock B because it is higher up
Rock A because it has less mass
Neither because they are not moving
Which form of energy is almost always produced during energy transformations?
heat
light
sound
electricity
Mechanical energy is the combination of which two other forms of energy?
electrical and chemical
kinetic and gravitational potential
kinetic and sound
electromagnetic and nuclear
A person uses a bow to shoot an arrow at a target. In which diagram does the bow and arrow have the greatest amount of potential energy?
1
2
3
4
At what point would the pendulum below have the greatest KINETIC energy?
A
B
C
D
As a candle burns, the chemical energy stored in the wax is transformed into
heat and light energy
heat and nuclear energy
electricity and light energy
electricity and elastic energy
Which type of energy is given off by moving atoms?
nuclear
chemical
thermal
sound
Which form of energy in gasoline is transformed into mechanical energy in a bus engine?
chemical
nuclear
mechanical
electrical
Which energy transformations occur when a battery-powered flashlight is turned on?
electrical → light → chemical
electrical → chemical → light
chemical → light → electrical
chemical → electrical → light
Name of tool
triple beam balance
spring scale
Property measured
mass
volume
length
force
Metric unit
grams
Newton
mL
cm
Metric unit
grams
Newton
mL
cm
Property measured
mass
volume
length
force
Name of tool
triple beam balance
spring scale
What is the acceleration of the cart based on the diagram?
2 m/s2
.5 m/s2
10 m/s2
20 m/s2
If the cart moves a total distance of 10 m, then how much work is done on the cart? Use the formula listed below.
Work = Force x distance
200 J
100 J
1 J
20 J
Which simple machine makes it easy to move the cart?
wheel and axle
lever
pulley
screw
