Wind power

Wind power is

• the energy of the wind

• the movement of the wind

• electricity

It is a 'new' form of energy

• true - it has been used only recently

• false - it has been used for millennia for sailing, grinding grains and pumping water

It is considered renewable

• true, because it cannot be used up

• true, because it is a new energy

• false, because it causes some type of pollution

The plant that produces electricity using wind is called

• wind turbine

• wind generator

• wind blades

• wind tower

A wind turbine exploits

• electricity

• kinetic and mechanical energy

• solar energy

An area suitable for a wind farm must be

• near the sea

• on land

• windy

• away from villages and towns

The function of the gear box is to

• transform electricity into mechanical energy

• transform mechanical energy into electricity

• speed up the movement of the shaft

• reduce the movement of the blades

• speed up the movement of the blades

Motion is transformed into electtricity

• in the rotor

• in the gear box

• in the generator

• in the tower

Winds form

• when the sun heats up the air

• when air moves from low pressure areas to high pressure areas

• when air cools down and expands

• when air moves from high pressure areas to low pressure areas

When the Earth releases heat

• the air expands and pressure increases

• the air gets colder and pressure increases

• the air expands and pressure decreases

• clouds move into high pressure areas