Have you ever wondered…
- why the buckle of the seatbelt can feel hotter than the belt?
- why engines in cars get hot?
- why some appliances have energy ratings?
- what insulation does in your jacket or house?
- how electricity gets from the wall to your phone?
During your daily lives energy is being used and is moving all around you. It can take up many different shapes and forms. It can be felt as heat, noise and light, or seen as a movement. Regardless of the source, energy makes things happen!
Forms of Energy
There are 5 main forms of energy for this topic
- Kinetic energy is the energy of movement. Anything that moves has kinetic energy. The faster the object moves and the more mass it has, the more kinetic energy it has.
- Heat energy can come from the Sun, flames, chemical reactions, electrical devices or even from a person or animal. Heat warms, burns, dries, melts, and makes hot-air balloons rise.
- Light energy comes from the Sun, light globes, fires and animals such as glow-worms. We can only see a VERY small amount of all the light energy around us.
- Sound energy is the energy that air has when it is vibrating, Your ears and brain interpret the vibrating of air as sounds, Sound comes from your voice, musical instruments, cars and power tools.
- Electrical energy is produced by power stations, solar cells, batteries and lightning. Electrical energy powers your TV computer, microwave and toaster by converting into the previous energies listed.
List forms of energy being used in the classroom around you in your book.
Reference: Person Year 8 Science Textbook p.175-177