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* Read the passage and then do the tasks that follow.In humankind’s millions of years on earth, many types of energy resources have been used. However, in the last ninety years, petroleum has become by far the most important. Accounting for over 50 percent of all energy consumed, it is so essential that, without petroleum, we could be faced with economic disaster.Of course, the earth’s supply of petroleum will not last forever, and in fact, it will disappear sooner than most people believe. At...
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* Read the passage and then do the tasks that follow.
In humankind’s millions of years on earth, many types of energy resources have been used. However, in the last ninety years, petroleum has become by far the most important. Accounting for over 50 percent of all energy consumed, it is so essential that, without petroleum, we could be faced with economic disaster.
Of course, the earth’s supply of petroleum will not last forever, and in fact, it will disappear sooner than most people believe. At the current rate of consumption, the world’s proven oil reserves may be exhausted within forty or fifty years.
1. How long have many types of energy resources been used?
They have been …………………………………………………………………………………………………………
2. How long has petroleum become the most important?
It has ………………………………………………………………………………………………………………………
3. What could we be faced if there were no petroleum?
We could …………………………………………………………………………………………………………………
4. According to the passage, how long may oil reserves be exhausted?
They may …………………………………………………………………………………………………………………

0
13 tháng 12 2021

of - economic - sooner - exhausted

13 tháng 12 2021

thank nha

II. Read the passage carefully and then do the tasks.We use many different energy sources to do work for us. Energy sources are classified into two groups - renewable and nonrenewable.Non-renewable energy sources are those that take millions of years to form and will run out some day. It is energy that comes from fossil fuels such as coal, crude oil, and natural gas. Fossil fuels are mainly made up of carbon and were formed millions of years ago. The chemical reaction which takes place when we...
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II. Read the passage carefully and then do the tasks.

We use many different energy sources to do work for us. Energy sources are classified into two groups - renewable and nonrenewable.

Non-renewable energy sources are those that take millions of years to form and will run out some day. It is energy that comes from fossil fuels such as coal, crude oil, and natural gas. Fossil fuels are mainly made up of carbon and were formed millions of years ago. The chemical reaction which takes place when we burn fossil fuels releases carbon compounds such as carbon monoxide and carbon dioxide into the air. Carbon dioxide is one of the green house gases which is contributing to global warming and air pollution.

On the other hand, renewable energy sources will never run out, are better for the environment and do not cause pollution. Renewable energy is often called green energy because it is a natural energy, always available and does not have to be formed like nonrenewable energy. The green energy is always there. For example, the Sun consistently shines, water is abundant, and the winds blow throughout the year. The five types include solar, energy from the Sun; geothermal, energy from heat within the Earth; hydroelectric, energy from moving water; biomass, energy from dead plants and microorganisms and finally, energy from the wind.

A. Decide if the flowing statements are True (T) or False (F)

1.     Non -renewable energy is a source of energy that will eventually run out.

2.      Renewable energy comes from natural sources, like sunlight, wind, water, and heat of the Earth.

3.      Burning fossil fuels is harmful to the environment.

4.      Renewable resources are better for the environment, but they are limited in supply.

5.       carbon is the main element in fossil fuels.

Wind is the primary source of hydroelectricity energy. 

B. Answer the questions.

1.     What are fossil fuels?..............................................................

2.      When were fossil fuels formed?.............................................................

3.       Do carbon dioxide emissions causes climate change on Earth?..................................

4.       How many types of renewable energy sources are there? What are they?

5.      Are renewable sources bad for the environment?.............................................................

Why is renewable energy called green energy?     

1
5 tháng 3 2022

 

A

1. T

2. T

3. T

4. T

5. T

6. F

B

1. Fossil fuels are mainly made up of carbon and were formed millions of years ago, such as coal, crude oil, and natural gas.

2. Millions of years ago.

3. Yes, they do. It is contributing to global warming

4. Five. They are solar energy, hydroelectric, geothermal, biomass and energy from the wind.

II. Read the passage carefully and then do the tasks.We use many different energy sources to do work for us. Energy sources are classified into two groups -renewable and nonrenewable.Non-renewable energy sources are those that take millions of years to form and will run out some day. It isenergy that comes from fossil fuels such as coal, crude oil, and natural gas. Fossil fuels are mainly made up ofcarbon and were formed millions of years ago. The chemical reaction which takes place when we...
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II. Read the passage carefully and then do the tasks.
We use many different energy sources to do work for us. Energy sources are classified into two groups -
renewable and nonrenewable.
Non-renewable energy sources are those that take millions of years to form and will run out some day. It is
energy that comes from fossil fuels such as coal, crude oil, and natural gas. Fossil fuels are mainly made up of
carbon and were formed millions of years ago. The chemical reaction which takes place when we burn fossil
fuels releases carbon compounds such as carbon monoxide and carbon dioxide into the air. Carbon dioxide is
one of the green house gases which is contributing to global warming and air pollution.
On the other hand, renewable energy sources will never run out, are better for the environment and do not
cause pollution. Renewable energy is often called green energy because it is a natural energy, always available
and does not have to be formed like nonrenewable energy. The green energy is always there. For example, the
Sun consistently shines, water is abundant, and the winds blow throughout the year. The five types
include solar, energy from the Sun; geothermal, energy from heat within the Earth; hydroelectric, energy from
moving water; biomass, energy from dead plants and microorganisms and finally, energy from the wind.
A. Decide if the flowing statements are True (T) or False (F)
1. Non –renewable energy is a source of energy that will eventually run out.
2. Renewable energy comes from natural sources, like sunlight, wind, water, and heat of the Earth.
3. Burning fossil fuels is harmful to the environment.
4. Renewable resources are better for the environment, but they are limited in supply.
5. carbon is the main element in fossil fuels.
6. Wind is the primary source of hydroelectricity energy.
B. Answer the questions.
1. What are fossil fuels? ……………………………………….
2. When were fossil fuels formed? ……………………………………..
3. Do carbon dioxide emissions causes climate change on Earth?.............................
4. How many types of renewable energy sources are there? What are they?
…………………………………………….

5. Are renewable sources bad for the environment?…………………………………….
6. Why is renewable energy called green energy?......................................................

1
30 tháng 6 2023

A

1T - 2T - 3T - 4F - 5T - 6F

B

1 Fossil fuels are carbon-based energy sources like coal, crude oil, and natural gas

2 Fossil fuels were formed millions of years ago

3 Yes, it does

4 There are five types: solar, geothermal, hydroelectric, biomass, and wind

5 No, renewable sources aren't

6  Because it is a natural energy, always available and does not have to be formed like nonrenewable energy

Read the following passage on transport, and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions from 43 to 50. The Sun today is a yellow dwarf star. It is fueled by thermonuclear reactions near its center that convert hydrogen to helium. The Sun has existed in its present state for about four billion six hundred million years and is thousands of times larger than the Earth. By studying other stars, astronomers can predict what the rest of...
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Read the following passage on transport, and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions from 43 to 50.

The Sun today is a yellow dwarf star. It is fueled by thermonuclear reactions near its center that convert hydrogen to helium. The Sun has existed in its present state for about four billion six hundred million years and is thousands of times larger than the Earth.

By studying other stars, astronomers can predict what the rest of the Sun’s life will be like. About five billion years from now, the core of the Sun will shrink and become hotter. The surface temperature will fall. The higher temperature of the center will increase the rate of thermonuclear reactions. The outer regions of the Sun will expand approximately 35 million miles, about the distance to Mercury, which is the closest planet to the Sun. The Sun will then be a red giant star. Temperatures on the Earth will become too high for life to exist.

Once the Sun has used up its thermonuclear energy as a red giant, it will begin to shrink. After it shrinks to the size of the Earth, it will become a white dwarf star. The Sun may throw off huge amounts of gases in violent eruptions called nova explosions as it changes from a red giant to a white dwarf.

After billions of years as a white dwarf, the Sun will have used up all its fuel and will have lost its heat. Such a star is called a black dwarf. After the Sun has become a black dwarf, the Earth will be dark and cold. If any atmosphere remains there, it will have frozen over the Earth’s surface.

The passage has probably been taken from _______.

A. a scientific chronicle            

B. a news report

C. a work of science fiction     

D. a scientific journal

1
12 tháng 7 2019

Đáp án D

bài viết đưa ra các dự đoán khoa học về quá trình thay đổi của Mặt trời. Đây khổng phải là tác phẩm tiểu thuyết hư cấu, cũng không phải một bản báo cáo mới hay bản ghi chép những sự kiện khoa học. Đây là một đoạn trong một bài báo khoa học.

Read the following passage on transport, and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions from 43 to 50.     The Sun today is a yellow dwarf star. It is fueled by thermonuclear reactions near its center that convert hydrogen to helium. The Sun has existed in its present state for about four billion six hundred million years and is thousands of times larger than the Earth.     By studying other stars, astronomers can predict what the...
Đọc tiếp

Read the following passage on transport, and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions from 43 to 50.

    The Sun today is a yellow dwarf star. It is fueled by thermonuclear reactions near its center that convert hydrogen to helium. The Sun has existed in its present state for about four billion six hundred million years and is thousands of times larger than the Earth.

    By studying other stars, astronomers can predict what the rest of the Sun’s life will be like. About five billion years from now, the core of the Sun will shrink and become hotter. The surface temperature will fall. The higher temperature of the center will increase the rate of thermonuclear reactions. The outer regions of the Sun will expand approximately 35 million miles, about the distance to Mercury, which is the closest planet to the Sun. The Sun will then be a red giant star. Temperatures on the Earth will become too high for life to exist.

    Once the Sun has used up its thermonuclear energy as a red giant, it will begin to shrink. After it shrinks to the size of the Earth, it will become a white dwarf star. The Sun may throw off huge amounts of gases in violent eruptions called nova explosions as it changes from a red giant to a white dwarf.

    After billions of years as a white dwarf, the Sun will have used up all its fuel and will have lost its heat. Such a star is called a black dwarf. After the Sun has become a black dwarf, the Earth will be dark and cold. If any atmosphere remains there, it will have frozen over the Earth’s surface.

The passage has probably been taken from ___.

A. a scientific chronicle

B. a news report

C. a work of science fiction

D. a scientific journal

1
22 tháng 2 2017

Đáp án D

bài viết đưa ra các dự đoán khoa học về quá trình thay đổi của Mặt trời. Đây khổng phải là tác phẩm tiểu thuyết hư cấu, cũng không phải một bản báo cáo mới hay bản ghi chép những sự kiện khoa học. Đây là một đoạn trong một bài báo khoa học.

Read the following passage on transport, and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions from 43 to 50. The Sun today is a yellow dwarf star. It is fueled by thermonuclear reactions near its center that convert hydrogen to helium. The Sun has existed in its present state for about four billion six hundred million years and is thousands of times larger than the Earth. By studying other stars, astronomers can predict what the rest of...
Đọc tiếp

Read the following passage on transport, and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions from 43 to 50.

The Sun today is a yellow dwarf star. It is fueled by thermonuclear reactions near its center that convert hydrogen to helium. The Sun has existed in its present state for about four billion six hundred million years and is thousands of times larger than the Earth.

By studying other stars, astronomers can predict what the rest of the Sun’s life will be like. About five billion years from now, the core of the Sun will shrink and become hotter. The surface temperature will fall. The higher temperature of the center will increase the rate of thermonuclear reactions. The outer regions of the Sun will expand approximately 35 million miles, about the distance to Mercury, which is the closest planet to the Sun. The Sun will then be a red giant star. Temperatures on the Earth will become too high for life to exist.

Once the Sun has used up its thermonuclear energy as a red giant, it will begin to shrink. After it shrinks to the size of the Earth, it will become a white dwarf star. The Sun may throw off huge amounts of gases in violent eruptions called nova explosions as it changes from a red giant to a white dwarf.

After billions of years as a white dwarf, the Sun will have used up all its fuel and will have lost its heat. Such a star is called a black dwarf. After the Sun has become a black dwarf, the Earth will be dark and cold. If any atmosphere remains there, it will have frozen over the Earth’s surface.

The word “there” in the last sentence of paragraph 4 refers to _______.

A. our own planet                   

B. the core of a black dwarf

C. the outer surface of the Sun          

D. the planet Mercury

1
15 tháng 12 2017

Đáp án A

“After the Sun has become a black dwarf, the Earth will be dark and cold. If any atmosphere remains there, it will have frozen over the Earth’s surface”

trong ngữ cảnh này, phó từ there thay thế cho “the Earth” ở câu trước và đó chính là hành tinh của chúng ta “our own planet”

Read the following passage on transport, and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions from 43 to 50.     The Sun today is a yellow dwarf star. It is fueled by thermonuclear reactions near its center that convert hydrogen to helium. The Sun has existed in its present state for about four billion six hundred million years and is thousands of times larger than the Earth.     By studying other stars, astronomers can predict what the...
Đọc tiếp

Read the following passage on transport, and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions from 43 to 50.

    The Sun today is a yellow dwarf star. It is fueled by thermonuclear reactions near its center that convert hydrogen to helium. The Sun has existed in its present state for about four billion six hundred million years and is thousands of times larger than the Earth.

    By studying other stars, astronomers can predict what the rest of the Sun’s life will be like. About five billion years from now, the core of the Sun will shrink and become hotter. The surface temperature will fall. The higher temperature of the center will increase the rate of thermonuclear reactions. The outer regions of the Sun will expand approximately 35 million miles, about the distance to Mercury, which is the closest planet to the Sun. The Sun will then be a red giant star. Temperatures on the Earth will become too high for life to exist.

    Once the Sun has used up its thermonuclear energy as a red giant, it will begin to shrink. After it shrinks to the size of the Earth, it will become a white dwarf star. The Sun may throw off huge amounts of gases in violent eruptions called nova explosions as it changes from a red giant to a white dwarf.

    After billions of years as a white dwarf, the Sun will have used up all its fuel and will have lost its heat. Such a star is called a black dwarf. After the Sun has become a black dwarf, the Earth will be dark and cold. If any atmosphere remains there, it will have frozen over the Earth’s surface.

The word “there” in the last sentence of paragraph 4 refers to.

A. our own planet

B. the core of a black dwarf 

C. the outer surface of the Sun

D. the planet Mercury

1
4 tháng 7 2017

Đáp án A

“After the Sun has become a black dwarf, the Earth will be dark and cold. If any atmosphere remains there, it will have frozen over the Earth’s surface”

trong ngữ cảnh này, phó từ there thay thế cho “the Earth” ở câu trước và đó chính là hành tinh của chúng ta “our own planet”Đáp án A

“After the Sun has become a black dwarf, the Earth will be dark and cold. If any atmosphere remains there, it will have frozen over the Earth’s surface”

trong ngữ cảnh này, phó từ there thay thế cho “the Earth” ở câu trước và đó chính là hành tinh của chúng ta “our own planet”

Read the following passage on transport, and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions from 43 to 50.     The Sun today is a yellow dwarf star. It is fueled by thermonuclear reactions near its center that convert hydrogen to helium. The Sun has existed in its present state for about four billion six hundred million years and is thousands of times larger than the Earth.     By studying other stars, astronomers can predict what the...
Đọc tiếp

Read the following passage on transport, and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions from 43 to 50.

    The Sun today is a yellow dwarf star. It is fueled by thermonuclear reactions near its center that convert hydrogen to helium. The Sun has existed in its present state for about four billion six hundred million years and is thousands of times larger than the Earth.

    By studying other stars, astronomers can predict what the rest of the Sun’s life will be like. About five billion years from now, the core of the Sun will shrink and become hotter. The surface temperature will fall. The higher temperature of the center will increase the rate of thermonuclear reactions. The outer regions of the Sun will expand approximately 35 million miles, about the distance to Mercury, which is the closest planet to the Sun. The Sun will then be a red giant star. Temperatures on the Earth will become too high for life to exist.

    Once the Sun has used up its thermonuclear energy as a red giant, it will begin to shrink. After it shrinks to the size of the Earth, it will become a white dwarf star. The Sun may throw off huge amounts of gases in violent eruptions called nova explosions as it changes from a red giant to a white dwarf.

          After billions of years as a white dwarf, the Sun will have used up all its fuel and will have lost its heat. Such a star is called a black dwarf. After the Sun has become a black dwarf, the Earth will be dark and cold. If any atmosphere remains there, it will have frozen over the Earth’s surface.

It can be inferred from the passage that the Sun ___.

A. has been in existence for 10 billion years

B. is approximately halfway through its life as a yellow dwarf

C. will continue to be a yellow dwarf for another 10 billion years

D. is rapidly changing in size and brightness

1
2 tháng 3 2018

Đáp án B

“The Sun today is a yellow dwarf star…The Sun has existed in its present state for about four billion six hundred million years “

Mặt trời đã tồn tại được hơn 4 tỉ năm với đặc tính là một ngôi sao lùn màu vàng

Đoạn tiếp sau có “About five billion years from now, the core of the Sun will shrink and become hotter” /Khoảng 5 tỉ năm sau, lõi mặt trời sẽ nhỏ lại và trở nên nóng hơn.

Như vậy dựa vào các thông tin trên, ta thấy mặt trờ đã trải qua gần 1 nửa thoài gian tồn tại là ngôi sao lùn màu vàng

Read the following passage on transport, and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions from 43 to 50. The Sun today is a yellow dwarf star. It is fueled by thermonuclear reactions near its center that convert hydrogen to helium. The Sun has existed in its present state for about four billion six hundred million years and is thousands of times larger than the Earth. By studying other stars, astronomers can predict what the rest of...
Đọc tiếp

Read the following passage on transport, and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions from 43 to 50.

The Sun today is a yellow dwarf star. It is fueled by thermonuclear reactions near its center that convert hydrogen to helium. The Sun has existed in its present state for about four billion six hundred million years and is thousands of times larger than the Earth.

By studying other stars, astronomers can predict what the rest of the Sun’s life will be like. About five billion years from now, the core of the Sun will shrink and become hotter. The surface temperature will fall. The higher temperature of the center will increase the rate of thermonuclear reactions. The outer regions of the Sun will expand approximately 35 million miles, about the distance to Mercury, which is the closest planet to the Sun. The Sun will then be a red giant star. Temperatures on the Earth will become too high for life to exist.

Once the Sun has used up its thermonuclear energy as a red giant, it will begin to shrink. After it shrinks to the size of the Earth, it will become a white dwarf star. The Sun may throw off huge amounts of gases in violent eruptions called nova explosions as it changes from a red giant to a white dwarf.

After billions of years as a white dwarf, the Sun will have used up all its fuel and will have lost its heat. Such a star is called a black dwarf. After the Sun has become a black dwarf, the Earth will be dark and cold. If any atmosphere remains there, it will have frozen over the Earth’s surface.

It can be inferred from the passage that the Sun _______.

A. has been in existence for 10 billion years

B. is approximately halfway through its life as a yellow dwarf

C. will continue to be a yellow dwarf for another 10 billion years

D. is rapidly changing in size and brightness

1
26 tháng 12 2019

Đáp án B

“The Sun today is a yellow dwarf star…The Sun has existed in its present state for about four billion six hundred million years “

Mặt trời đã tồn tại được hơn 4 tỉ năm với đặc tính là một ngôi sao lùn màu vàng

Đoạn tiếp sau có “About five billion years from now, the core of the Sun will shrink and become hotter” /Khoảng 5 tỉ năm sau, lõi mặt trời sẽ nhỏ lại và trở nên nóng hơn.
Như vậy dựa vào các thông tin trên, ta thấy mặt trờ đã trải qua gần 1 nửa thoài gian tồn tại là ngôi sao lùn màu vàng