Energy resources

Which two of the following statements are good reasons for using fossil fuels to generate electricity?

• Supplies of fossil fuels are limited.

• Fossil fuels can be used to generate electricity at any time.

• Fossil fuels are non-renewable.

• A few large power stations can generate the electricity for a million homes.

• Burning fossil fuels produces carbon dioxide.

Which of the following is/are not a renewable energy source?

• oil

• solar

• wind

• coal

Energy is stored and released in a pumped storage power station by:

• Using solar panels to generate electricity

• Pumping water to a higher elevation and releasing it to generate electricity

• Burning fossil fuels to produce steam

• Using wind turbines to generate electricity

When electricity is needed the water in the high level reservoir is allowed to flow to the low level reservoir. The flowing water generates electricity. The water in the high level reservoir stores ............................ energy.

• potential

• kinetic

• thermal

• chemical

When electricity is needed the water in the high level reservoir is allowed to flow to the low level reservoir. The flowing water generates electricity. The flowing water has a store of .............................. energy.

• kinetic

• potential

• thermal

• chemical

When electricity is needed the water in the high level reservoir is allowed to flow to the low level reservoir. The flowing water generates electricity. The water turns the ........................... which is connected to a generator.

• turbine

• wheel

• pump

• valve

When electricity is needed the water in the high level reservoir is allowed to flow to the low level reservoir. The flowing water generates electricity. The generator transfers some energy as ................................ which is wasted.

• heat

• light

• sound

• kinetic energy

Which form of energy is transferred from wind to generate electricity?

• heat

• kinetic

• light

• sound

Different energy sources are likely to be used up first. Which two of these energy sources is likely to be used up first?

• tides

• Sun

• oil

• gas

• waves

Before a nuclear power station can be demolished, the remaining nuclear fuel, radioactive waste materials and reactor must be carefully removed. What is this process called?

• decommissioning

• decontaminating

• dismantling