Wind power

Wind power

• is energy derived from the wind

• is always available

• is used to produce electricity

• produces absolutely no pollution

What device do you need to convert the energy of the wind into electricity?

• Wind turbines

• Propellers

• Wind mills

• The sun

Do wind turbines need a propeller?

• Yes

• No

• Sometimes

What is a wind farm?

• A farm that uses windpower

• Wind turbines grouped together in an area

• A plant that produces energy to move wind turbines

• A farm that produces wind

What type of energy does a wind farm exploit?

• Electricity

• Mechanical energy

• Thermal energy

• All otpions correct

The basic elements of wind turbines are:

• blades, shafts, gears and generators

• towers

• blades

• gears and blades

• A = shaft, B = gear, C = generator,

  D = wind, E = blades

• A = gears, B = shaft, C = blades,

  D = wind, E = generator

• A = generator, B = gear, C = shaft,

  D = wind, E = blades

• A = shaft, B = gear, C = generator,

  D = water, E = blades

What type of pollution do wind turbines cause?

• They pollute the air and the soil

• They do not pollute

• They produce noise and great visual impact

• They pollute water and soil

Where are wind turbines placed?

• On land, near villages and towns

• On land and off shore

• Only on plains

• In windy areas

Winds are generated by

• the movement of clouds

• air moving from low to high pressure areas

• heat absorbed and then released by the Earth

• air moving from high to low pressure areas