Question
Fig. 4.1 shows an outline of the main parts of a geothermal power station used to generate
electricity. Some parts of the power station are labelled.
(a) State the names of the parts of the power station labelled A and B.
part A .
part B.
(b) Geothermal energy is one source of renewable energy.
State two other sources of renewable energy.
1.
2.
(c) State two environmental advantages, other than being renewable, of a geothermal power
station compared to a coal-fired power station.
1.
2.
Answer/Explanation
Answer:
(a) (part A) turbine
(part B) generator
(b) any 2 valid examples of renewable energy from:
sunlight wind wave hydroelectric biofuels/biomass tidal
(c) any 2 from:
does not produce carbon dioxide OR does not contribute to global warming
no sulphur dioxide or nitrous oxides produced
no mining needed for fuel
Question
Fig. 5.1 shows a wind turbine.
a) Describe how the wind turbine produces electrical energy.
b) Wind turbines are used in many countries to replace coal-fired power stations.
(i) State one disadvantage of using wind turbines compared to coal-fired power stations.
(ii) State two advantages of using wind turbines instead of coal-fired power stations.
1. ………………………………………………………………………………………………………………………
2. ………………………………………………………………………………………………………………………
Answer/Explanation
Answer:
(a) Any three from:
kinetic energy (of wind/air)
turns / drives turbine (blades)
(turbine blades) turn generator
coil turns in magnetic field
(b) (i) any two from:
renewable source of energy
no atmospheric pollution
conserves fossil fuels owtte
do not contribute to global warming