Types of Energy
9SCIE - Energy for Life
Finn Le Sueur
2024
Ngā Whāinga Ako
- Be able to identify different forms of energy
- Be able to describe different forms of energy
- Be able to categorise energies
Types of Energy
For each of these types of energy, think of and write down one
tauria/example:
- Heat
- Magnetic
- Radiant
- Sound
- Nuclear
- Gravitational
- Kinetic
- Chemical
- Elastic
- Electrical
Active vs. Potential Energy
We split these 10 types of energy into two broad categories.
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Active Energy
Energy that is doing work (something that can be
observed and measured).
Potential Energy
Energy that is stored some way, and can be released
to do something active!
Active Energy Tauria
Kinetic, sound, radiant, heat and electrical
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Potential Energy Tauria
Gravitational, nuclear, chemical, elastic and magnetic
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Mahi Tuatahi
Match these types of energy and their definitions up in your
book:
| Thermal |
Light |
Light Bulbs, a Bunsen flame |
talking, TV, radio |
| Gravitational |
Kinetic |
hot water, a hot radiator |
Nuclear bombs, power stations |
| Nuclear |
Sound |
Anything that is moving |
Food, batteries, burning things |
| Elastic |
Electrical |
book on a shelf, bungee jumper |
a wind-up-toy, rubber band |
| Computer |
Chemical |
|
|
Energy Circus
Move around the room and see how each toy works. Write down
the types of energy involved in each object!
Conservation of Energy
The Law of Energy Conservation is true throughout
the universe. We have never found a situation where it doesn’t
apply!
\[
\begin{aligned}
\text{Energy in} &= \text{Energy out}
\end{aligned}
\]
Energy cannot be created or destroyed, only transformed from one type
to another.
Whakamātau Whakaaro /
Thought Experiment
Consider a skydiver falling to Earth.
- What kind of energy do they have before they jump
out of the plane? Active or potential?
- What about after they start falling?
Discuss with the person and then write your answers in your book.
Whakatika
- When they are about to jump out of the plane
they have gravitational potential energy.
- When they are falling they have both
gravitational potential and kinetic energy.
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Tauria
- Chemical energy in food is transformed to heat
energy and kinetic energy by our bodies
- Gravitational energy in a ball is converted to
kinetic energy when it falls to the ground
What energy transformations are happening at the boxes?
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- Chemical potential energy in the battery is
transformed into electrical energy moving along the earphones wire
- Electrical energy in the wire causes the earphone
unit to move transforming it into sound energy
