BEST IELTS General Reading Test 311

BEST IELTS General Reading Test 311


IELTS General Reading Test


Reading Passage 3


As energy prices rise and the effects of greenhouse gas emissions become more widespread, people everywhere are becoming increasingly concerned about using fossil fuels. More and more people are turning to so-called “green technologies” as a way to reduce dependence on nonrenewable fossil fuels. The ideal alternative energy source would be sustainable (the supply will not be exhausted), clean (no emissions), and reliable. The three most popular alternative energy sources are geothermal power, solar power, and wind power.

Since geothermal energy taps heat from the earth, its resources range from water found just below the surface of the earth, to hot water and hot rock found a few miles below the surface, to even deeper rock of extremely high temperatures. In a process similar to drilling for oil, wells as deep as a mile or more can be drilled into underground reservoirs to tap steam and hot water that are used to run turbines and create energy. Power companies can then transmit this energy over power lines.

IELTS General Reading Test

Geothermal power on a smaller scale can be used for heating and cooling houses or commercial buildings. Geothermal heat pumps, also known as ground-source heat pumps, rely on the fact that the earth beneath the surface remains at a relatively constant temperature throughout the year. Like a cave, the ground is warmer than the air above it during the winter and cooler in the summer

. The geothermal heat pump transfers the heat stored in the earth into the building during the winter, and transfers it out of the building and into the ground during the summer. The ground, in other words, acts as a heat source in winter and a heat sink in summer. While geothermal heat pumps are an emissions- free and reliable source of energy, the biggest disadvantage is that such systems are expensive to install.

IELTS General Reading Test

Solar energy has come a long way from the clunky boxes of the 1970s. Today, solar energy is commonly collected by sleek and efficient photovoltaic (PV) panels. The photovoltaic cells convert sunlight directly into electricity and are made of semiconductors such as crystalline silicon or other thin-film materials. The benefits of solar power vary according to how much exposure a given building has to the sun. However, one does not need to live in the desert to take advantage of solar power. Cloudy Germany is the worldwide leader in the use of solar power.

Solar power is not as pricey as geothermal power, but having a panel professionally installed can still be costly. Some enterprising home-owners reduce the initial costs by purchasing inexpensive kits and setting up the system on their own. The biggest disadvantage of a solar power system is its dependence on the amount of sunlight collected, but some cutting-edge panels can generate energy even in the rain.

IELTS General Reading Test

Wind power is created when wind is used to generate mechanical power or electricity. Most wind turbines convert the wind’s kinetic energy into mechanical power. The wind turns the blades, which spin a shaft connected to a generator. A generator then converts this mechanical power into electricity. A group of wind turbines can produce electricity and feed it into the utility grid, where it is sent through transmission lines to homes and businesses. Like solar and geothermal energy, wind is a renewable resource that produces no emissions.

Small wind energy systems can be used by homes, farms, or communities. Such systems can be connected to the larger electrical grid or used for stand-alone energy generation—a particularly attractive option for anyone living far from power company lines. A grid-connected wind turbine can reduce one’s reliance on the power company for electricity . If the turbine cannot deliver the needed energy, the power company then makes up the difference. However, in order to take advantage of wind energy, a turbine must be in an area with average wind speed of at least 10 miles an hour, and such systems can be very

IELTS General Reading Testexpensive.

Whether a given home or business uses wind, solar, or geothermal power depends on a variety of economic and environmental factors. However, experts agree that investing in alternative energy now—whether by individuals or power companies—will pay dividends in the future.

IELTS General Reading Test

Questions 28—30

Complete the summary below. Choose NO MORE THAN TWO WORDS from the passage for each answer.

Write your answers on lines 28—30 on your answer sheet.

These days, people are interested in reducing their consumption of 28………………………… They are looking at sources of 29…………………… to supply their power needs. People want sources that are 30………………………do not cause pollution, and can be consistently depended on.

Questions 31-33

Which o f the following facts about geothermal energy are mentioned in the passage?

Choose THREE answers from the list below and write the correct letters, A—E, on lines 31—33 on your answer sheet.

A. is easiest to use where there is a plentiful supply of groundwater

B. is used to run power plants

C. costs a good deal of money to set up

D. requires electricity to power the heat pump

E. is used for cooling as well as heating buildings

IELTS General Reading Test

Questions 34-36

Which o f the following facts about solar energy are mentioned in the passage? Choose

THREE answers from the list below and write the correct letters, A-E, on lines 34-36 on your answer sheet.

A. can be used even in areas without intense sunlight

B. the panels are usually installed on the roof of the house

C. does not have to be installed by a professional

D. the amount of power generated fluctuates with the amount of exposure to the sun

E. is often used by farmers to power electric fences

IELTS General Reading Test

Questions 37-40

Which o f the following facts about wind energy are mentioned in the passage?

Choose FOUR answers from the list below and write the correct letters, A—G, on lines 37—40 on your answer sheet.

A. wind turbines are considered unsightly by many people

B. is used by individual home-owners as well as by power companies

C. the energy that it generates cannot be stored for later use

D. must be installed in an area that receives a certain amount of wind

E. wind turbines create a lot of noise

F. can be used in conjunction with electricity supplied by a power company

G. is as clean a source of energy as geothermal and solar systems

IELTS General Reading Test



BEST IELTS General Reading Test 311

IELTS General Reading Test


28. fossil fuel

29. alternative energy

30. sustainable

31. B

32. C

33. E

34. A

35. C

36. D

37. B

38. D

39. F

40. G

IELTS General Reading Test

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