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On average, more than 100,000 wildfires, also called wildland fires or forest fires, destroy two million hectares of land in the U.S every year. A wildfire moves at speeds of about 20 kilometers an hour and can last for weeks, consuming everything - trees, brush, homes, and humans – in its path.

There are three conditions for a wildfire. Oxygen is necessary for a fire to burn. Heat sources help start the wildfire. Although most wildfires are started by people, natural factors like lightning, hot winds, and even the sun can all provide enough heat to start a wildfire.

Firefighters fight wildfires by removing the conditions a wildfire to burn. Traditional methods include using water an fire retardants to put out the fires. Firefighters also fight wildfires with "controlled burning". These controlled forest fires remove small trees, bushes, and ground litter from a forest. This will deprive a wildfire of fuel and prevent future forest fires.

Although often harmful and destructive to humans, wildfires play an important role in nature. Even healthy forests contain dead trees and decaying plant matter. When a fire turns them to ashes, nutrients return to the soil. They also remove sick plants and harmful insects from a forest. And by burning through thick leaves and branches, wildfires allow sunlight to reach to forest floor, making it possible for a new generation of trees to grow.

30. What does the phrase "deprive a wildfire of fuel" in the third paragraph mean?

A. create fuel for a wildfire                          B. provide a wildfire with fuel

C. save fuel for a wildfire                   D. take away fuel from a wildfire

31. What does the word "they" in the last paragraph refer to?

A. wildfires           B. forests              C. ashes                D. nutrients

32. According to the last paragraph, why do wildfires play an important role in nature?

A. They burn all leaves and branches.      B. They burn sick plants and harmful insects.

C. They burn a new generation of trees.        D. They burn nutrients in the soil to ashes.

33. Which of the following is NOT mentioned in the passage?

A. Benefits of wildfires                      B. Causes of wildfires

C. Worldwide wildfires                      D. Controlled wildfires

1
22 tháng 10 2021

1 D

2 A

3 B

4 C

A forest is a special place. In the forest, surrounded by tall trees, you are cut off from the would around you, and filled with the sights and sounds of nature. Many fairy tales and legends are set in forests, which have been thought to hold magic and mystery. Today we know that these are only stories, but the forest is still a place that holds many of the world's most valuable resources. Forest has always been important to people. In the past, many people got food by hunting forest animals...
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A forest is a special place. In the forest, surrounded by tall trees, you are cut off from the would around you, and filled with the sights and sounds of nature. Many fairy tales and legends are set in forests, which have been thought to hold magic and mystery. Today we know that these are only stories, but the forest is still a place that holds many of the world's most valuable resources.
Forest has always been important to people. In the past, many people got food by hunting forest animals and gathering wild plants. With the advance of civilization, fewer people now live in forests, but forest are more valuable than ever. Forests have an important economic value because they provide us with resources such as timber. Forests are vital to the environment because they clean the air we breathe. Forests are also treasured for their beauty

Matching

1. Forest |a. Precious

2. Tales |b. The activity of looking for and killing animals

3. Valuable|c. Important

4. Hunt |d. Large area of land covered by trees

5. Vital |e. Stories about imaginary events or people

True or false

1. When you are in the forest you are away from the natural

2. The forest is a place that holds many of the world's most valuable resources

3. Forest are always important to people

4. Many people now live in forest

5. Forest are not only treasured for their beauty but also for their economic value

1
5 tháng 6 2021

jyjy

There are many kinds of pollution. Air, water, and land can be polluted. Some pollution is caused by nature, such as floods, forest fires, and volcanoes. People are the major cause of pollution. We pollute the air with our cars, homes, and factories. Smoke from factories and car exhaust makes the air looks gray and smoggy. Some people cannot go outside when the air is very bad! We pollute the water by dumping garbage and chemicals in the water. Plants and animals die because of the pollution in...
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There are many kinds of pollution. Air, water, and land can be polluted. Some pollution is caused by nature, such as floods, forest fires, and volcanoes. People are the major cause of pollution. We pollute the air with our cars, homes, and factories. Smoke from factories and car exhaust makes the air looks gray and smoggy. Some people cannot go outside when the air is very bad! We pollute the water by dumping garbage and chemicals in the water. Plants and animals die because of the pollution in the water. We pollute the soil with chemicals and garbage. We harm the land by cutting down trees in the forest, especially to build roads and new houses without careful planning and thinking.

     The only way to save our environment is to think about pollution. How can you stop or limit pollution? How do we protect our environment? Conservation is one way to protect our environment. Conservation is the wise use and protection of our environment. We can control water pollution by not producing as much waste and by proper disposal of sewage and garbage. We can take care of recreation land by cleaning up after ourselves and not causing more pollution. Carpooling and public transportation will help reduce air pollution.

     Recycling is a type of conservation. Recycling is reusing items over again or in a new way. Recycling can help US conserve our natural resources so they will last many more years.

A. Find the word in bold in the passage that means:

1. the protection of the natural environment                                       …………..

2. have a bad effect on something                                                       …………..

3. a large amount of water covering an area that is usually dry          …………..

4. sharing a car ride with other people                                                …………..

5. waste gases that come out of an engine                                          …………..

6. the process of making air, water, soil, etc. dirty                             …………..

7. get rid of                                                                                  …………..

1
15 tháng 1 2022

There are many kinds of pollution. Air, water, and land can be polluted. Some pollution is caused by nature, such as floods, forest fires, and volcanoes. People are the major cause of pollution. We pollute the air with our cars, homes, and factories. Smoke from factories and car exhaust makes the air looks gray and smoggy. Some people cannot go outside when the air is very bad! We pollute the water by dumping garbage and chemicals in the water. Plants and animals die because of the pollution in the water. We pollute the soil with chemicals and garbage. We harm the land by cutting down trees in the forest, especially to build roads and new houses without careful planning and thinking.

     The only way to save our environment is to think about pollution. How can you stop or limit pollution? How do we protect our environment? Conservation is one way to protect our environment. Conservation is the wise use and protection of our environment. We can control water pollution by not producing as much waste and by proper disposal of sewage and garbage. We can take care of recreation land by cleaning up after ourselves and not causing more pollution. Carpooling and public transportation will help reduce air pollution.

     Recycling is a type of conservation. Recycling is reusing items over again or in a new way. Recycling can help US conserve our natural resources so they will last many more years.

A. Find the word in bold in the passage that means:

1. the protection of the natural environment                                       Conversation  

2. have a bad effect on something                                                       dumping  

3. a large amount of water covering an area that is usually dry          floods 

4. sharing a car ride with other people                                                carpooling 

5. waste gases that come out of an engine                                         exhaust 

6. the process of making air, water, soil, etc. dirty                            pollution 

7. get rid of                                                                                  exhaust 

Read the passage, then answer the questions belowAre you looking for a cheap, clean, effective source of power that doesn't cause pollution or waste natural resources? Look no further than solar energy from the Sun.At present, most of our electricity comes from the use of coal and gas, oil or nuclear power. This power could be provided by the Sun. One percent of the solar energy that reaches the Earth is enough to provide power for the total population.Many countries are already using solar...
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Read the passage, then answer the questions below

Are you looking for a cheap, clean, effective source of power that doesn't cause pollution or waste natural resources? Look no further than solar energy from the Sun.

At present, most of our electricity comes from the use of coal and gas, oil or nuclear power. This power could be provided by the Sun. One percent of the solar energy that reaches the Earth is enough to provide power for the total population.

Many countries are already using solar energy. Solar panels are placed on the roofs of a house and the Sun's energy is used to heat water. The energy can be stored for a number of days, so on cloudy days you can use solar energy, too.

Sweden has an advanced solar energy program. There, all buildings will be heated by solar energy and cars will use solar power instead of gas by the year 2015.

When will cars use solar power instead of gas in Sweden?

1
24 tháng 5 2019

Cars will use solar power instead of gas in Sweden by the year 2015.

OR: In Sweden, cars will use solar power instead of gas by the year 2015.

9 tháng 8 2018

Yes, it is

Read the passage, then answer the questions below (2.5pts)Are you looking for a cheap, clean, effective source of power that doesn't cause pollution or waste natural resources? Look no further than solar energy from the Sun.At present, most of our electricity comes from the use of coal and gas, oil or nuclear power. This power could be provided by the Sun. One percent of the solar energy that reaches the Earth is enough to provide power for the total population.Many countries are already using...
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Read the passage, then answer the questions below (2.5pts)

Are you looking for a cheap, clean, effective source of power that doesn't cause pollution or waste natural resources? Look no further than solar energy from the Sun.

At present, most of our electricity comes from the use of coal and gas, oil or nuclear power. This power could be provided by the Sun. One percent of the solar energy that reaches the Earth is enough to provide power for the total population.

Many countries are already using solar energy. Solar panels are placed on the roofs of a house and the Sun's energy is used to heat water. The energy can be stored for a number of days, so on cloudy days you can use solar energy, too.

Sweden has an advanced solar energy program. There, all buildings will be heated by solar energy and cars will use solar power instead of gas by the year 2015.

Questions: Is the solar energy used in Vietnam now?

1
10 tháng 11 2018

Đáp án: Yes, it is.

Use the words provided to fill the blanks Earth who destroy because in fire when quickly at Almost a hundred thousand people were killed and half a million homes (1)......as a result of an earthquake in Tokyo in 1923. The earthquake began a minute before noon (2)......many people of Tokyo were cooking their midday meals. Thousands of stoves were overturned as soon as the (3).......began to shake. As a result, small fires broke out everywhere and (4).....spread. The...
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Use the words provided to fill the blanks

Earth who destroy because in fire when quickly at

Almost a hundred thousand people were killed and half a million homes (1)......as a result of an earthquake in Tokyo in 1923. The earthquake began a minute before noon (2)......many people of Tokyo were cooking their midday meals. Thousands of stoves were overturned as soon as the (3).......began to shake. As a result, small fires broke out everywhere and (4).....spread. The fire engines were prevented for going to help as many of the roads had cracked open. It was impossible to use fire fighting equipment (5)......most of the water pipes had burst. Consequently, over ninety percent of the damage was caused by the (6)......rather than by the collapse of the buildings. Most of those (7).......died were not killed in the earthquake itself but in the fires, which followed. If the earthquake had occurred (8)......night while people were sleeping, far fewer would have died

2
5 tháng 3 2019

Almost a hundred thousand people were killed and half a million homes (1) destroyed as a result of an earthquake in Tokyo in 1923. The earthquake began a minute before noon (2) when many people of Tokyo were cooking their midday meals. Thousands of stoves were overturned as soon as the (3) earth began to shake. As a result, small fires broke out everywhere and (4) quickly spread. The fire engines were prevented for going to help as many of the roads had cracked open. It was impossible to use fire fighting equipment (5) because most of the water pipes had burst. Consequently, over ninety percent of the damage was caused by the (6) fire rather than by the collapse of the buildings. Most of those (7) who died were not killed in the earthquake itself but in the fires, which followed. If the earthquake had occurred (8) at night while people were sleeping, far fewer would have died

19 tháng 12 2019

Almost a hundred of thousand people were killed and half a million homes destroyed as a result of an earthquake in Tokyo in 1923. The earthquake began a minute before noon when the inhabitants of Tokyo were cooking their midday meals. Thousands of stoves were overturned as soon as the earth began to shake. As a result, small fire broke out everywhere and quickly spread. The fire engines were prevented from going to help because many of the roads had cracked open. It was impossible to use firefighting equipment as most of the water pipes had burst. Consequently, over ninety percent of damage was caused by fire rather than by the collapse of the buildings. Most of those who died were not killed in the earthquake itself but in the fires, which followed. If the earthquake had occurred at night while people were sleeping, far fewer would have died.

Read the passage, then answer the questions below (2.5pts)Are you looking for a cheap, clean, effective source of power that doesn't cause pollution or waste natural resources? Look no further than solar energy from the Sun.At present, most of our electricity comes from the use of coal and gas, oil or nuclear power. This power could be provided by the Sun. One percent of the solar energy that reaches the Earth is enough to provide power for the total population.Many countries are already using...
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Read the passage, then answer the questions below (2.5pts)

Are you looking for a cheap, clean, effective source of power that doesn't cause pollution or waste natural resources? Look no further than solar energy from the Sun.

At present, most of our electricity comes from the use of coal and gas, oil or nuclear power. This power could be provided by the Sun. One percent of the solar energy that reaches the Earth is enough to provide power for the total population.

Many countries are already using solar energy. Solar panels are placed on the roofs of a house and the Sun's energy is used to heat water. The energy can be stored for a number of days, so on cloudy days you can use solar energy, too.

Sweden has an advanced solar energy program. There, all buildings will be heated by solar energy and cars will use solar power instead of gas by the year 2015.

Question: Is solar energy an efficient source of power?

1
13 tháng 11 2019

Đáp án: Yes. It is.

4 tháng 1 2017

Yes. It is.