UNIT 7 SAVING ENERGY

UNIT 7: SAVING ENERGY
I. Circle the letter (A, B, C, or D) of the best word to use in each blank like example 0.
There is now increasing concern about the world’s energy (0) ______ particularly about those involving fossil (1) ______. In less than a hundred years we shall probably (2) ______ all the present (3) ______ of oil and gas. The world’s coal (4) ______ should last longer but, once used, these cannot be (5) ______. It is important, therefore, that we should develop such (6) ______ sources of energy as solar energy and nuclear energy as well as water and wind (7) ______ (classed as (8) ______ energy). Until these energy (9) ______ are widely used, it is important for the developed countries to reduce energy (10) ______ as much as possible.
0. A. possessions B. goods C. resources D. materials
1. A. fuels B. powers C. forms D. energies
2. A. end B. complete C. total D. exhaust
3. A. findings B. productions C. amounts D. sources
4. A. reserves B. stores C. mines D. contents
5. A. updated B. repeated C. renewed D. produced
6. A. traditional B. alternative C. revolutionary D. surprising
7. A. force B. strength C. power D. motion
8. A. repeatable B. continual C. renewable D. continuous
9. A. goods B. supplies C. provisions D. materials
10. A. exhaustion B. destruction C. waste D. consumption
II. Read the following sentences about the different forms of energy available. Match the sentences in Part One with correct sentences in Part Two.
PART ONE
0. Muscles and wood were the first sources on energy used by early man.
1. Coal made the Industrial Revolution in the nineteenth century possible.
2. Today we depend on oil more than any other fuels.
3. Gas is considered as a “mineral” because, together with coal, it is part of the earth’s crust.
4. Hydroelectric power is used to produce electricity.
5. Geothermal energy is produced from the heat stored in the earth’s core.
6. The wind was used as a power source over 1,300 years ago in Persia when the first windmill was built to turn a millstone.
7. Waves have enormous power.
8. Incoming tides can be trapped behind a dam across a bay or an estuary.
9. A huge amount of solar energy reaches the earth’s outer atmosphere.
10. Nuclear fuels, such as uranium-235 and plutonium, can be made to produce immense heat by a progress called “fission”
PART TWO
A. Like oil, it is a fossil fuel and is thus a non-renewable source of energy.
B. One danger, however, is in getting rid of the radioactive wastes which are produced.
C. They increase and decrease more slowly than the wind, thus making them easier to use as source of energy.
D. It was the first fossil fuel to be used to power machinery.
E. However, it is thinly spread, and collecting it in countries laike Britain and northern Europe is still difficult and expensive.
F. It is used as a fuel in cars, ships and aeroplanes, and even in rockets.
G. It is produced by the fall of water trapped in a dam.
H. It took thousands of years to progress to using coal on a large scale.
I. This internal heat helps to produce geysers and team springs and can be used to generate electricity in countries like New Zealand.
J. The water is then allowed to flow out pass water wheels as the tide goes out.
K. For modern purposes, however, it is necessary to build a machine which can store the energy abtained for use on calm days.
Example 0-H
Answer
1 ___ / 2. ___ / 3. ___ / 4. ___ / 5. ___ / 6. ___ / 7. ___/ 8. ___ / 9. ___ / 10. ___
III. Fill in each blank with the correct form of the word in capitals.
1. Air and water are ____________ in our life. (NECESSARY)
2. In the future, many buildings will be ____________ by solar energy. (HOT)
3. My brother can repair electric ____________ very well. (APPLY)
4. We want to buy ____________ that will save money. (PRODUCE)
5. These ____________ will conserve the earth’s resources. (