Question

Question 1

Pumped storage reservoirs are a way of    _____   energy, ready to   _____    electricity when we need a lot of it in a hurry. When there is a sudden _____

in demand most power stations take a long time to increase their _____ . Whilst we're waiting for them we would have power cuts, possibly with_____ consequences if, for example we lost traffic lights or air traffic control. Pumped storage reservoirs such as the one at   _____in North_____can go from nothing to full power in a few ______ , and can run for ______an hour or so until the other power stations can catch up and take over.

half

seconds

Wales

dinorwic

fatal

storing

generate

surge

output

Question 2

Hydroelectric power means using _____   water. Nowadays this turns a turbine which runs a_____to make electricity. This can be done with a water wheel and a fast-flowing stream, but a modern _____ power station has a huge   _____ which creates a deep   _____  , which stores lots of   _____potential energy in the water so it flows fast through the turbines. The    _____     dam on the Colorado river in the USA provides   _____ for the city of Las Vegas. Hydroelectric power is   _____  , needs no   _____ and produces no _____ . However, the dams are    _____ to build and you need to_____ a large area to create the lake, with enviromental consequences.

dam

fuel

expensive

electricity

flood

Hoover

renewable

hydroelectric

gravitational

generator

pollution

flowing

lake

Question 3

Biogas is a mixture containing_____  . It is produced by the action of   _____, digesting organic waste material in _____ conditions. The process can occur in digesters that we have built, or naturally underground in   _____ sites. The gas can be used to power _____   , and used for heating and  _____   in homes and businesses.

anaerobic

cooking

landfill

methane

bacteria

vehicles

Question 4

Coal, _____ and natural gas (chemical name: _____ ) are called fossil fuels because they were formed from the remains of plants or _____   long ago. We    _____ the fuels in power stations, releasing the stored chemical  _____ . The heat turns water into  _____  , which drives    _____  , they drive the _____  .

Are fossil fuels renewable?   _____ .

Do they cause pollution?  _____  .

steam

no

generators

oil

yes

animals

energy

methane

turbines

burn

Answer 1