The diagrams below show two methods of using water to produce electricity. Summarise the information by selecting and reporting the main features, and make comparisons where relevant. Hydroelectric dam

The diagrams show two different ways in which

water

can be used to produce

electricity

. In both diagrams,

water

Add an article

the water

show examples

turns a turbine and a

spindle

, which powers a

generator

.

However

, the way in which

this

is done is slightly different in each case. In the hydroelectric dam, the process begins when a gate in the dam is opened to allow

water

from a reservoir to enter and flow down a passage called a penstock. The

water

turns the turbine and the

spindle

, and the

spindle

rotates in the

generator

to produce

electricity

.

This

is distributed to power lines. In the wave-air

generator

, there are two chambers, a lower

chamber

and an upper

chamber

. Waves enter the lower

chamber

, and the turbine and

spindle

in the upper

chamber

are turned by air which rises from the lower

chamber

. As with the hydroelectric dam, the

spindle

then

produces

electricity

in the

generator

.

Instead

of being sent to power lines,

however

, the

electricity

is sent directly to a lighthouse or buoys. These diagrams show how

water

can produce

electricity

in just a few simple steps.