1. Types of Energy

2. Kinetic Energy
Energy stored in a moving object

3. Light Energy
The energy from luminous objects that reflects off surfaces into our eyes enabling us to see.

4. Heat Energy
Heat energy from the Sun keeps us warm. Heat energy is a result of most energy changes.

5. Sound Energy
Sound waves carry energy from one place to another through the vibrations of atoms and molecules.

6. Potential Energy magnetic strain (or elastic) chemical nuclear
There are several types of ‘potential energy’, that are stored until they are converted into one of the previous four types.
magnetic
strain (or elastic)
chemical
nuclear

7. Gravitational Potential Energy
The energy stored in an object because it has been lifted up to a height.
The object will have more energy if it is more massive or higher off the ground.

8. Electrical Energy SOUND HEAT KINETIC LIGHT
Most of the energy transferred in homes and industry is ELECTRICAL ENERGY because it is easily transferred as …
SOUND
HEAT
KINETIC
LIGHT

9. Energy Changers
In our homes there are many energy changers. Here are some of the electrical devices that might be found at home.
Electrical energy => light + heat
Electrical energy => light + sound + heat
Electrical energy => heat + light + kinetic + sound

10. Energy Changers Heat + Light Sound + Light + Heat Heat + Light + Sound
device
energy in
energy out
Toaster
Computer
Hi-Fi
Hair drier
Kettle
Drill
Lava lamp
Heat + Light
Electrical
Light + Sound + Kinetic + Heat
Sound + Light + Heat
Kinetic + Heat + Sound + Light
Heat + Light + Sound
Kinetic + Sound + Heat
Light + Kinetic + Heat
Notice that for each energy change, the most useful energy type is written first, and the energy that is wasted is written last.