Question
Which energy source boils water to make steam in power stations?
energy from tides
energy from waves
hydroelectric energy
nuclear energy
Answer/Explanation
Ans: D
Question
Which source of energy uses the production of steam to generate electrical energy?
hydroelectric
nuclear
tides
waves
Answer/Explanation
Ans: B
Question
A machine is very efficient.
What does this mean?
It produces a large amount of power.
It uses very little energy.
It wastes very little energy.
It works very quickly.
Answer/Explanation
Ans: C
Question
Which row describes an advantage and a disadvantage of wind turbines?
| advantage | disadvantage |
A | no fuel needed | harmful gases released |
B | variable supply | fuel needed |
C | no harmful gases released | variable supply |
D | constant supply | noisy |
Answer/Explanation
Ans: C
Question
Which source of energy is used in a nuclear power station to generate electrical energy?
different types of atom regrouping
heavy nuclei splitting
radioactive isotopes decaying
radioactive atoms emitting β-particles
Answer/Explanation
Ans: B
A nuclear reactor produces and controls the release of energy from splitting the heavy nucleus of uranium. Uranium-fuelled nuclear power is a clean and efficient way of boiling water to make steam which drives turbine generators. Except for the reactor itself, a nuclear power station works like most coal or gas-fired power stations.