Energy

Uses

Movement/Kinetic energy

▪ Wind – to propel sailing boats
▪ Running water – to spin a turbine and generate electricity
▪ Moving animals – elephants as a means of transport

Stored/Potential energy

▪ The raised weight of a pile driver has stored energy. When released, it is used to dive piles into the ground
▪ The water on top of a dam has potential energy. As the water falls, it is used to rotate the turbines.
▪ Wound-up spring has stored energy. When released, it is used to move toys.

Heat energy

▪ To iron our clothes, cook our food and dry our laundry
▪ To power jet engines
▪ To sterilise clinical instruments.

Light energy

▪ To enable us to see things
▪ Used in traffic lights to control the flow of traffic
▪ Used in lighthouses to warn ships of danger

Electrical energy

▪ To power lamps so that it can provide light energy in the dark.
▪ To power electric cookers so that it can provide heat energy to cook our food.
▪ To power air-conditioner to produce cool air.

Magnetic energy

▪ In compass to help us determine directions
▪ Electromagnets attached to cranes to lift heavy iron/steel objects
▪ Electromagnets used to separate iron/steel objects from other objects in the scrap yard.

Sound energy

▪ Form of communication
▪ Music as a form of entertainment
▪ Echoes sent by ships are used to determine the depth of the seabed.