Saving energy does not have to be expensive or time-consuming. But what can you do to save energy? There is plenty that you can do to help the process of energy conservation. You can save energy by following these simple rules: making sure that the kettle does not contain more water than is needed; always washing a full load in the washing machine rather than a half load; turning down your central heating by 1°C - this could cut your heating bill by 10%; being sure that hot water taps are not left running and replacing washers if your taps drip, turning off any lights and your computer at work if you are not using them; changing to energy-saving light bulbs these use around a quarter of the electricity of standard bulds and will last eight times longer; closing your curtains at dusk to keep the warm air from escaping through the windows; and switching off electrical appliances when they are not in use.
31. The energy-saving light bulbs consume about of electricity amount in comparison with standard ones. A. 25%                        B. 45%                                  C. 35%                                 D. 15% 32. The word “they” in the passage refer to? A. windows                 B. electrical applliances        C. ordinary bulbs                 D. curtains 33. The word “cut” in the passage is closest in meaning to?
A. reduce                     B. raise                                  C. increase                           D. destroy 34. Which of the following sentences is NOT true, according to the passage? A. Turn off electricity appliances if we do not use them. B. The ways to save energy are not time-consuming or costly. C. We should close our curtains so that our house looks more beautiful. D. Energy-saving light bulbs should be used in order to save electricity. 35. What is the main topic of the passage? A. How to protect the environment                   B. How to save energy C. How to keep your house warm                     D. How to use light bulbs

Hello students. Today I'd like to tell you some information about types and sources of energy. Energy is classified into two main groups: renewable and non-renewable.

The energy generated from natural sources such as the sun, wind, rain, and tides is called renewable energy. They are plentiful and can be generated again and again. They also have low carbon emissions so they are considered green and environment-friendly. Moreover, using renewable energy can reduce your electricity bills. Unfortunately, solar energy can be only used during the daytime but not during night or the rainy season. Geothermal energy also can bring toxic chemicals beneath the earth's surface to the top and can create environmental changes.

Non-renewable energy is the energy taken from other sources that are available on earth. They are limited and will run out in the future. They can't be re-generated in a short time. Fossil fuels - natural gas, oil and coal - are examples of them. They are cheap and easy to use. However, when burnt, they release toxic gases in the air so they cause serious environmental changes such as global warming. And the important thing is that non-renewable sources will expire someday.

Question 1: This text may be written by a teacher.

A. True

B. False

C. Not Given

1.When you save energy, you not only save money, you also reduce the demand for ___________ such as coal, oil, and natural gas and that is a great way to play a part in saving the planet. A. carbon footprint B. electricity C. fossil fuels D. biogas 2.In India, the demand for ___________ has always been more than the supply. A. shortage B. sources C. slogan D. electricity 3.___________ energy is produced by collecting sunlight and converting it into electricity. A. Hydro B. Nuclear C. Solar D. Wind 4.There are many available ___________ power sources in Vietnam including sun, wind, water, etc. A. nuclear B. hydro C. renewable D. solar 5.Laos and Cambodia have big plans for building up to 11 ___________ on the lower Mekong. A. dams B. slogans C. energy D. coals 6.___________ can be an excellent source of free, renewable energy for poor farmers. A. Turbine B. Biogas C. Solar panel D. Bulb 7.The government has warned that Britain will face power ___________ in the coming winters. A. coal B. shortages C. slogans D. energy

Read the following passage and mark the letter A, B, C or D on your answer sheet to indicate the correct answer to each of the following questions.

PHOTOSYNTHESIS

Almost all living things ultimately get their energy from the sun. In a process called photosynthesis, plants, algae, and some other organisms capture the sun's energy and use it to make simple sugars such as glucose. Most other organisms use these organic molecules as a source of energy. Organic materials contain a tremendous amount of energy. As food, they fuel our bodies and those of most other creatures. In such forms as oil, gas, and coal, they heat our homes, run our factories and power our cars.

Photosynthesis begins when solar energy is absorbed by chemicals called photosynthetic pigments that are contained within an organism. The most common photosynthetic pigment is chlorophyll. The bright green color characteristic of plants is caused by it. Most algae have additional pigments that may mask the green chlorophyll. Because of these pigments, algae may be not only green but brown, red, blue or even black.

In a series of enzyme-controlled reactions, the solar energy captured by chlorophyll and other pigments is used to make simple sugars, with carbon dioxide and water as the raw materials. Carbon dioxide is one of very few carbon- containing molecules not considered to be organic compounds. Photosynthesis then converts carbon from an inorganic to an organic form. This is called carbon fixation. In this process, the solar energy that was absorbed by chlorophyll is stored as chemical energy in the form of simple sugars like glucose. The glucose is then used to make other organic compounds. In addition, photosynthesis produces oxygen gas. All the oxygen gas on earth, both in the atmosphere we breathe and in the ocean, was produced by photosynthetic organisms. Photosynthesis constantly replenishes the earth's oxygen supply.

Organisms that are capable of photosynthesis can obtain all the energy they need from sunlight and do not need to eat. They are called autotrophs. Plants are the most familiar autotrophs on land. In the ocean, algae and bacteria are the most important autotrophs. Many organisms cannot produce their own food and must obtain energy by eating organic matter. These are called heterotrophs.

Advances in Photosynthesis and Respiration, Hardback.1990.

What can be inferred about algae?

A. Green algae are less common than other colors of algae. 

B. Algae are photosynthetic organisms. 

C. They are chemically different from other plants. 

D. They are ineffective producers of sugars.

Decide if the following statements are True or False or Not Given according to the text.

Hello students. Today I'd like to tell you some information about types and sources of energy. Energy is classified into two main groups: renewable and non-renewable.

The energy generated from natural sources such as the sun, wind, rain, and tides is called renewable energy. They are plentiful and can be generated again and again. They also have low carbon emissions so they are considered green and environment-friendly. Moreover, using renewable energy can reduce your electricity bills. Unfortunately, solar energy can be only used during the daytime but not during night or the rainy season. Geothermal energy also can bring toxic chemicals beneath the earth's surface to the top and can create environmental changes.

 

Non-renewable energy is the energy taken from other sources that are available on earth. They are limited and will run out in the future. They can't be re-generated in a short time. Fossil fuels - natural gas, oil and coal - are examples of them. They are cheap and easy to use. However, when burnt, they release toxic gases in the air so they cause serious environmental changes such as global warming. And the important thing is that non-renewable sources will expire someday.

This text may be written by a teacher.

A. True

B. False

C. Not Given

Hello students. Today I'd like to tell you some information about types and sources of energy. Energy is classified into two main groups: renewable and non-renewable.

The energy generated from natural sources such as the sun, wind, rain, and tides is called renewable energy. They are plentiful and can be generated again and again. They also have low carbon emissions so they are considered green and environment-friendly. Moreover, using renewable energy can reduce your electricity bills. Unfortunately, solar energy can be only used during the daytime but not during night or the rainy season. Geothermal energy also can bring toxic chemicals beneath the earth's surface to the top and can create environmental changes.

Non-renewable energy is the energy taken from other sources that are available on earth. They are limited and will run out in the future. They can't be re-generated in a short time. Fossil fuels - natural gas, oil and coal - are examples of them. They are cheap and easy to use. However, when burnt, they release toxic gases in the air so they cause serious environmental changes such as global warming. And the important thing is that non-renewable sources will expire someday.

Decide if the following statements are True or False or Not Given according to the text.

Question. This text may be written by a teacher.

A. True

B. False

C. Not Given