Page 109 - Grasp English B1+ (Student Book)

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Science Energy and Electricity

B. Answer the questions.

1. What are the benefits of using fossil fuels?
2. Why would some people prefer to use
renewable energy sources?
3. Which types of energy sources are used
in the area where you live?

4. Order the stages needed to produce
electricity in a coal-burning power station.

a) As the coal is burnt, the heat it produces boils water which runs through the furnace.

b) As the turbine turns, it spins a generator, which produces electricity.
c) Coal is taken from underground mines. This is dangerous for miners who can get trapped.
d) The coal is then turned into a fine powder to help it burn more easily.
e) The coal is transported to a power station. It can travel by road, rail or sea.
f) The electricity then travels along wires to our homes and other buildings.
g) This produces steam, which makes a large turbine turn.

C. Discuss the questions in pairs.
1. What have you done so far today that has used electricity?
2. What tips would you give someone to help save energy at home?

Project 1 Materials

D. Look at the image and text above for a coal-
• a potato, a lemon and an
burning power station. Work with a partner and
apple (and any other food
produce a similar text and image for one of the you want to test)
following renewable energy resources:
• a zinc nail
• solar • hydroelectric • a copper coin
• wind • biomass • two pieces of wire
• tidal • geothermal • a LED lightbulb

Instructions
Project 2
1. Insert the nail and coin into the first food.
E. Work in pairs or groups. Discuss the following questions The nail and coin should not be touching
and do the project on the right.
each other. Attach the wires to the coin
1. Did you know that food can generate electricity? and nail, and the other end of each wire
2. Which food do you think will be best at generating to the LED lightbulb.
electricity? Make your predictions. 2. Record your findings.

3. Repeat the experiment using different
foods.

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