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FORMS OF ENERGY
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Open up and read through the Energy PowerPoint presentation (on
www.mizellis.com ).
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Complete the following questions to show what you have learnt about energy.
1. Define energy:
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2. Wood and food are sources of energy but what is the ultimate source of energy?
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3. Use the table below to answer the following questions about energy.
(a)
What is the average energy gained from the food you eat in a day? …………
(b)
How many kilojoules of energy does a burning match produce?
(c)
Which has more energy stored in it, a car battery or 1 L of petrol? ………….
(d)
Is there enough energy stored in a battery to boil a kettle of water? …………
………….

Watch the BrainPop “Forms of energy”
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Answer the questions below to show your understanding of energy forms.
1.
Recall FOUR types of energy.
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2.
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Identify the type of energy:
(a) a person has when running.
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(b) a spring has when it is pulled.
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Complete the table below to identify ONE situation in which each form of energy is
evident.
Type of Energy
Situation in which this type of energy is
evident (ie. description and examples)
1. kinetic energy (KE)
2. potential energy (PE)
 stored energy (energy in any object which
has the potential to do work)
NB: the next 3 types of energy are of this type
3. gravitational potential energy (GPE)
4. elastic potential energy (EPE)
5. chemical potential energy
6. nuclear energy
7. sound energy
8. heat energy
9. light energy
10. electrical energy


Energy that is carried by moving charges.
stored in batteries as chemical PE.
CHAPTER 9
Core Science Stage 4: Unit 9.1
9.1
Types of energy
1. Types of energy and their sources
Complete the following table by identifying energy sources for each energy type listed.
Sources: fluorescent tube, uranium fission, chocolate bar, moving tennis ball,
vibrating violin string, rubber band, battery, infra-red lamp
Energy type
Source
Chemical potential
Sound
Light
Electrical
Heat
Elastic potential
Nuclear
Kinetic
2. Types of potential energy
Potential energy can be classified as: gravitational PE, elastic PE, chemical PE.
Classify each of the following examples into each category of potential energy.
Example
Category of potential energy
Air brakes in a truck
Wound watch spring
Kerosene
Sugar
Depressed trampoline canvas
Comet
Parachutist at the point of launch
3. Energy transformation
Describe the energy transformation illustrated.
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ENERGY TRANSFERS and CHANGES
(TRANFORMATIONS)

Watch the BrainPop “Kinetic Energy” and then “Potential Energy”

Open up and read through the Energy Transfers (Changes) and Transformations
PowerPoint presentation (on www.mizellis.com )

Answer the questions to show your understanding of energy change.
3.
Use a suitable example to describe what is meant by:
(a) an energy transfer
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(b) an energy transformation
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4.
Outline the Law of Conservation of Energy.
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5.
Outline the different kinds of energy involved in a trampoline jump.
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6.
Imagine riding your bike along a flat gravel road. If you brake suddenly, the bike
eventually stops. It no longer has kinetic energy. However, the energy is not lost.
Describe what happens to the kinetic energy.
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Complete the table below.
ENERGY USED
ENERGY CONVERTER
ENERGY PRODUCED
light globe
electric fan
petrol engine
kinetic
electric
torch cell
steam engine
atomic bomb
electrical
heat
catapult
kinetic
waterwheel
kinetic
7.
sound
Consider a solar-powered car.
(a) What is the source of energy for a solar-powered car?
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(b) What energy conversion occurs when the car is moving?
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(c) How would such car operate at night or on cloudy days?
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