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British space scientists are planning to join the American in the race to find evidence of life on (1)_______ planets. Alan Penny and his team at the Rutherford Appleton Laboratory have designed a telescope that is 40 times more powerful than Hubble. Known as ‘Darwin’, his telescope could tell if planets 50 (2) _______ years away have any kind of life on them. Two days (3) _______, NASA scientists had shown a proof that one of Jupiter’s moons could support life, Penny announced that his...
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British space scientists are planning to join the American in the race to find evidence of life on (1)_______ planets. Alan Penny and his team at the Rutherford Appleton Laboratory have designed a telescope that is 40 times more powerful than Hubble. Known as ‘Darwin’, his telescope could tell if planets 50 (2) _______ years away have any kind of life on them. Two days (3) _______, NASA scientists had shown a proof that one of Jupiter’s moons could support life, Penny announced that his telescope may be included in a European Space Agency mission. The Darwin project, with a (4)_______ of 500 million, is on a short list of two proposals. If approved it will probably be (5)_______ around 2015, its destination somewhere between Mars and Jupiter. The blueprint is actually for five telescopes positioned 50 meters apart in space, slowly circling a (6)_______ processing station. The combined data from these telescopes would build up a full picture of a planet, picking out faint images that have never been seen before. Darwin would not be able to take detailed photographs of the planets it (7) _______, but Penny believes a second- generation telescope could be sent up to do this. He claims it is worthwhile mapping the universe around our (8) _______ galaxy, even though these planets lie (9)_______ our reach for the moment. The European Space Agency will make its decision (10) ______ Darwin within three years.

1. A. another B. other C. others D. the other

2. A. light B. lighten C. lightening D. lighting

3. A. following B. after C. next D. later

4. A. price B. schedule C. charge D. budget

5. A. driven B. fetched C. launched D. taken

6. A. central B. centre C. middle D. heart

7. A. invents B. searches C. discovers D. looks

8. A. alone B. same C. one D. own

9. A. out B. toward C. beyond D. over

10. A. of B. on C. about D. with

Các bạn điền đáp án vui lòng trả lời tại sao lại chọn đáp án đó cho mình nhé

1
3 tháng 8 2020

c2 nên chọn a vì ở đây cần dùng từ light có nghĩa là ánh sáng (50 năm ánh sáng gì trên đoạn đó ) còn từ lightning nghĩa là sét nha

còn c9 nên dùng giới từ beyond

2 tháng 8 2020

1. A. another B. other C. others D. the other

2. A. light B. lighten C. lightening D. lighting

3. A. following B. after C. next D. later

4. A. price B. schedule C. charge D. budget

5. A. driven B. fetched C. launched D. taken

6. A. central B. centre C. middle D. heart

7. A. invents B. searches C. discovers D. looks

8. A. alone B. same C. one D. own

9. A. out B. toward C. beyond D. over

10. A. of B. on C. about D. with

How many planets are there in our galaxy? That’s a tricky question to answer. Are there other planets that support life? That’s exactly what the Kepler mission hopes to discover.NASA launched the Kepler space telescope, designed to find habitable planets, in 2009. So far it has discovered five new Earth-sized planets beyond our solar System. These planets are hotter than the Earth -much too hot for life as we know it. The Kepler team predict that they will need at least three years to find an...
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How many planets are there in our galaxy? That’s a tricky question to answer. Are there other planets that support life? That’s exactly what the Kepler mission hopes to discover.
NASA launched the Kepler space telescope, designed to find habitable planets, in 2009. So far it has discovered five new Earth-sized planets beyond our solar System. These planets are hotter than the Earth -much too hot for life as we know it. The Kepler team predict that they will need at least three years to find an Earth-like planet.The simplest requirement for a planet to have life is for there to be liquid water so the distance from the planet’s sun and therefore temperature are important. There also needs to be the correct amount of air. If a planet is as small as Mars (half the size of Earth) its weak gravity means that it can’t hold on to air molecules. If a planet is Neptune sized (four times bigger than Earth) it has very strong gravity and too much air. So size
matters too. The cost of the mission is approximately six hundred million dollars. It is scheduled to observe until 2013 but this could be extended. Will we be sad if we discover we are alone in our galaxy or happy if we find that we share it with other life forms?

B. Choose the correct answers.
1. What is the passage about?

A. Planets in our solar System

B. The difference between Earth and other planets
C. Space exploration to find habitable planets

D. NASA’s missions to explore the outer planets
2. The Kepler space telescope is looking for__________

A. new planets in our galaxy

B. life on other planets
C. liquid water on other planets

D. Earth-sized planets in the solar System
3. Kepler has found five planets that__________.

A. has water and air

B. are similar to Earth
C. are not too far away from the Earth

D. are not in our solar System
4. The Kepler team predict that they will need__________ to find an Earth-like planet.

A. three years and possibly longer

B. as much as three years
C. no more than three years

D. approximately three years
5. What are the primary factors that make a planet habitable?

A. Liquid water and living things

 B. Size and distance from the Sun
C. Hot temperature and weak gravity

D. Strong gravity and too much air
6. How much does the Kepler mission cost?

A. Exactly $600 million

B. About $600 million
C. More than $600 million

D. Less than $600 million
7. Which of the following statements is NOT true?

A. The planet can support life if it has water and air.

B. A very small planet will not have enough air.
C. Earth is four times as big as Neptune.

D. Kepler mission is scheduled to end in 2013.

 

1
20 tháng 5 2023

B. Choose the correct answers.
1. What is the passage about?

A. Planets in our solar System

B. The difference between Earth and other planets
C. Space exploration to find habitable planets

D. NASA’s missions to explore the outer planets
2. The Kepler space telescope is looking for__________

A. new planets in our galaxy

B. life on other planets
C. liquid water on other planets

D. Earth-sized planets in the solar System
3. Kepler has found five planets that__________.

A. has water and air

B. are similar to Earth
C. are not too far away from the Earth

D. are not in our solar System
4. The Kepler team predict that they will need__________ to find an Earth-like planet.
A. three years and possibly longer

B. as much as three years
C. no more than three years

D. approximately three years
5. What are the primary factors that make a planet habitable?
A. Liquid water and living things

 B. Size and distance from the Sun
C. Hot temperature and weak gravity

D. Strong gravity and too much air
6. How much does the Kepler mission cost?

A. Exactly $600 million

B. About $600 million
C. More than $600 million

D. Less than $600 million
7. Which of the following statements is NOT true?
A. The planet can support life if it has water and air.

B. A very small planet will not have enough air.
C. Earth is four times as big as Neptune.

D. Kepler mission is scheduled to end in 2013.

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 questions from 35 to 42.Life in the UniverseExobiology is the study of life that originates from outside of Earth. As yet, of course, no such life forms have been found. Exobiologists, however, have done important work in the theoretical study of where life is most likely to evolve, and what those extrateưestrial life forms might be like.What sorts of planets are most...
Đọc tiếp

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 questions from 35 to 42.

Life in the Universe

Exobiology is the study of life that originates from outside of Earth. As yet, of course, no such life forms have been found. Exobiologists, however, have done important work in the theoretical study of where life is most likely to evolve, and what those extrateưestrial life forms might be like.

What sorts of planets are most likely to develop life? Most scientists agree that a habitable planet must be terrestrial, or rock-based, with liquid surface water and biogeochemical cycles that somewhat resemble Earth’s. Water is an important solvent involved in many biological processes. Biogeochemical cycles are the continuous movement and transformation of materials in the environment. These cycles include the circulation of elements and nutrients upon which life and the Earth’s climate depend. Since (as far as we know) all life is carbon-based, a stable carbon cycle is especially important.

The habitable zone is the region around a star in which planets can develop life. Assuming the need for liquid surface water, it follows that most stars around the size of our sun will be able to sustain habitable zones for billions of years. Stars that are larger than the sun are much hotter and bum out more quickly; life there may not have enough time to evolve. Stars that are smaller than the sun have different problem. First of all, planets in their habitable zones will be so close to the star that they will be “tidally locked” – that is one side of the planet will always face the star in perpetual daylight with the other side in the perpetual night. Another possible obstacle to life on smaller stars is that they tend to vary in their luminosity, or brightness, due to flares and “star spots”. The variation can be large enough to have harmful effects on the ecosystem.

Of course, not all stars of the right size will give rise to life; they also must have terrestrial planets with the right kind of orbits. Most solar systems have more than one planet, which influence each other’s orbits with their own gravity. Therefore, in order to have a stable system with no planets flying out into space, the orbits must be a good distance from one another. Interestingly, the amount of space needed is roughly the width of a star’s habitable zone. This means that for life to evolve, the largest possible number of life-supporting planets in any star’s habitable zone is two.

Finally, not all planets meeting the above conditions will necessarily develop life. One major threat is large, frequent asteroid and comet impacts, which will wipe out life each time it tries to evolve. The case of Earth teaches that having large gas giants, such as Saturn and Jupiter,.in the outer part of the solar system can help keep a planet safe for life. Due to their strong gravitation, they tend to catch or deflect large objects before they can reach Earth.

The word “which” in paragraph 3 refers to

A. star

B. zone

C. region

D. planet

1
6 tháng 3 2019

Đáp án C

Kiến thức: Đọc hiểu

Giải thích:

Từ "which" trong đoạn 3 thay thế cho

A. ngôi sao  B. Vùng       C. khu vực   D. hành tinh

từ "which" thay thế cho cụm từ trước đó là "region"

Thông tin: The habitable zone is the region around a star in which planets can develop life.

Tạm dịch: Vùng có thể sinh sống là khu vực quanh những ngôi sao nở nơi mà hành tinh có thể phát triển sự sống.

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 questions from 35 to 42.Life in the Universe   Exobiology is the study of life that originates from outside of Earth. As yet, of course, no such life forms have been found. Exobiologists, however, have done important work in the theoretical study of where life is most likely to evolve, and what those extrateưestrial life forms might be like.   What sorts of planets...
Đọc tiếp

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 questions from 35 to 42.

Life in the Universe

   Exobiology is the study of life that originates from outside of Earth. As yet, of course, no such life forms have been found. Exobiologists, however, have done important work in the theoretical study of where life is most likely to evolve, and what those extrateưestrial life forms might be like.

   What sorts of planets are most likely to develop life? Most scientists agree that a habitable planet must be terrestrial, or rock-based, with liquid surface water and biogeochemical cycles that somewhat resemble Earth’s. Water is an important solvent involved in many biological processes. Biogeochemical cycles are the continuous movement and transformation of materials in the environment. These cycles include the circulation of elements and nutrients upon which life and the Earth’s climate depend. Since (as far as we know) all life is carbon-based, a stable carbon cycle is especially important.

   The habitable zone is the region around a star in which planets can develop life. Assuming the need for liquid surface water, it follows that most stars around the size of our sun will be able to sustain habitable zones for billions of years. Stars that are larger than the sun are much hotter and bum out more quickly; life there may not have enough time to evolve. Stars that are smaller than the sun have different problem. First of all, planets in their habitable zones will be so close to the star that they will be “tidally locked” – that is one side of the planet will always face the star in perpetual daylight with the other side in the perpetual night. Another possible obstacle to life on smaller stars is that they tend to vary in their luminosity, or brightness, due to flares and “star spots”. The variation can be large enough to have harmful effects on the ecosystem.

   Of course, not all stars of the right size will give rise to life; they also must have terrestrial planets with the right kind of orbits. Most solar systems have more than one planet, which influence each other’s orbits with their own gravity. Therefore, in order to have a stable system with no planets flying out into space, the orbits must be a good distance from one another. Interestingly, the amount of space needed is roughly the width of a star’s habitable zone. This means that for life to evolve, the largest possible number of life-supporting planets in any star’s habitable zone is two.

   Finally, not all planets meeting the above conditions will necessarily develop life. One major threat is large, frequent asteroid and comet impacts, which will wipe out life each time it tries to evolve. The case of Earth teaches that having large gas giants, such as Saturn and Jupiter,.in the outer part of the solar system can help keep a planet safe for life. Due to their strong gravitation, they tend to catch or deflect large objects before they can reach Earth.

 

The word “which” in paragraph 3 refers to

A. star 

B. zone 

C. region 

D. planet

1
25 tháng 11 2019

Đáp án C

Kiến thức: Đọc hiểu

Giải thích:

Từ "which" trong đoạn 3 thay thế cho

A. ngôi sao 

B. Vùng     

C. khu vực 

D. hành tinh

từ "which" thay thế cho cụm từ trước đó là "region"

Thông tin: The habitable zone is the region around a star in which planets can develop life.

Tạm dịch: Vùng có thể sinh sống là khu vực quanh những ngôi sao nở nơi mà hành tinh có thể phát triển sự sống.

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 questions from 35 to 42.Life in the UniverseExobiology is the study of life that originates from outside of Earth. As yet, of course, no such life forms have been found. Exobiologists, however, have done important work in the theoretical study of where life is most likely to evolve, and what those extrateưestrial life forms might be like.What sorts of planets are most...
Đọc tiếp

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 questions from 35 to 42.

Life in the Universe

Exobiology is the study of life that originates from outside of Earth. As yet, of course, no such life forms have been found. Exobiologists, however, have done important work in the theoretical study of where life is most likely to evolve, and what those extrateưestrial life forms might be like.

What sorts of planets are most likely to develop life? Most scientists agree that a habitable planet must be terrestrial, or rock-based, with liquid surface water and biogeochemical cycles that somewhat resemble Earth’s. Water is an important solvent involved in many biological processes. Biogeochemical cycles are the continuous movement and transformation of materials in the environment. These cycles include the circulation of elements and nutrients upon which life and the Earth’s climate depend. Since (as far as we know) all life is carbon-based, a stable carbon cycle is especially important.

The habitable zone is the region around a star in which planets can develop life. Assuming the need for liquid surface water, it follows that most stars around the size of our sun will be able to sustain habitable zones for billions of years. Stars that are larger than the sun are much hotter and bum out more quickly; life there may not have enough time to evolve. Stars that are smaller than the sun have different problem. First of all, planets in their habitable zones will be so close to the star that they will be “tidally locked” – that is one side of the planet will always face the star in perpetual daylight with the other side in the perpetual night. Another possible obstacle to life on smaller stars is that they tend to vary in their luminosity, or brightness, due to flares and “star spots”. The variation can be large enough to have harmful effects on the ecosystem.

Of course, not all stars of the right size will give rise to life; they also must have terrestrial planets with the right kind of orbits. Most solar systems have more than one planet, which influence each other’s orbits with their own gravity. Therefore, in order to have a stable system with no planets flying out into space, the orbits must be a good distance from one another. Interestingly, the amount of space needed is roughly the width of a star’s habitable zone. This means that for life to evolve, the largest possible number of life-supporting planets in any star’s habitable zone is two.

Finally, not all planets meeting the above conditions will necessarily develop life. One major threat is large, frequent asteroid and comet impacts, which will wipe out life each time it tries to evolve. The case of Earth teaches that having large gas giants, such as Saturn and Jupiter,.in the outer part of the solar system can help keep a planet safe for life. Due to their strong gravitation, they tend to catch or deflect large objects before they can reach Earth.
Question:
The word “which” in paragraph 3 refers to

A. star

B. zone

C. region

D. planet

1
7 tháng 11 2019

Đáp án C

Kiến thức: Đọc hiểu

Giải thích:

Từ "which" trong đoạn 3 thay thế cho

A. ngôi sao  B. Vùng       C. khu vực   D. hành tinh

từ "which" thay thế cho cụm từ trước đó là "region"

Thông tin: The habitable zone is the region around a star in which planets can develop life.

Tạm dịch: Vùng có thể sinh sống là khu vực quanh những ngôi sao nở nơi mà hành tinh có thể phát triển sự sống.

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 questions from 35 to 42.Life in the UniverseExobiology is the study of life that originates from outside of Earth. As yet, of course, no such life forms have been found. Exobiologists, however, have done important work in the theoretical study of where life is most likely to evolve, and what those extrateưestrial life forms might be like.What sorts of planets are most...
Đọc tiếp

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 questions from 35 to 42.

Life in the Universe

Exobiology is the study of life that originates from outside of Earth. As yet, of course, no such life forms have been found. Exobiologists, however, have done important work in the theoretical study of where life is most likely to evolve, and what those extrateưestrial life forms might be like.

What sorts of planets are most likely to develop life? Most scientists agree that a habitable planet must be terrestrial, or rock-based, with liquid surface water and biogeochemical cycles that somewhat resemble Earth’s. Water is an important solvent involved in many biological processes. Biogeochemical cycles are the continuous movement and transformation of materials in the environment. These cycles include the circulation of elements and nutrients upon which life and the Earth’s climate depend. Since (as far as we know) all life is carbon-based, a stable carbon cycle is especially important.

The habitable zone is the region around a star in which planets can develop life. Assuming the need for liquid surface water, it follows that most stars around the size of our sun will be able to sustain habitable zones for billions of years. Stars that are larger than the sun are much hotter and bum out more quickly; life there may not have enough time to evolve. Stars that are smaller than the sun have different problem. First of all, planets in their habitable zones will be so close to the star that they will be “tidally locked” – that is one side of the planet will always face the star in perpetual daylight with the other side in the perpetual night. Another possible obstacle to life on smaller stars is that they tend to vary in their luminosity, or brightness, due to flares and “star spots”. The variation can be large enough to have harmful effects on the ecosystem.

Of course, not all stars of the right size will give rise to life; they also must have terrestrial planets with the right kind of orbits. Most solar systems have more than one planet, which influence each other’s orbits with their own gravity. Therefore, in order to have a stable system with no planets flying out into space, the orbits must be a good distance from one another. Interestingly, the amount of space needed is roughly the width of a star’s habitable zone. This means that for life to evolve, the largest possible number of life-supporting planets in any star’s habitable zone is two.

Finally, not all planets meeting the above conditions will necessarily develop life. One major threat is large, frequent asteroid and comet impacts, which will wipe out life each time it tries to evolve. The case of Earth teaches that having large gas giants, such as Saturn and Jupiter,.in the outer part of the solar system can help keep a planet safe for life. Due to their strong gravitation, they tend to catch or deflect large objects before they can reach Earth

What is the topic of the passage?

A. The search for intelligent life

B. Conditions necessary for life

C. Characteristics of extraterrestrial life

D. Life in our solar system

1
29 tháng 10 2019

Đáp án B

Kiến thức: Đọc hiểu

Giải thích:

Chủ đề của đoạn văn là gì?

A. Cuộc tìm kiếm cuộc sống thông minh                B. Điều kiện cần thiết cho sự sống.

C. Đặc điểm của sự sống ngoài Trái đất                 D. Sự sống trong hệ mặt trời của chúng ta.

Thông tin: Exobiology is the study of life that originates from outside of Earth.

Tạm dịch: Sinh học ngoài Trái đất là một nghiên cứu về cuộc sống từ bên ngoài bề mặt Trái Đất

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 questions from 35 to 42.Life in the UniverseExobiology is the study of life that originates from outside of Earth. As yet, of course, no such life forms have been found. Exobiologists, however, have done important work in the theoretical study of where life is most likely to evolve, and what those extrateưestrial life forms might be like.What sorts of planets are most...
Đọc tiếp

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 questions from 35 to 42.

Life in the Universe

Exobiology is the study of life that originates from outside of Earth. As yet, of course, no such life forms have been found. Exobiologists, however, have done important work in the theoretical study of where life is most likely to evolve, and what those extrateưestrial life forms might be like.

What sorts of planets are most likely to develop life? Most scientists agree that a habitable planet must be terrestrial, or rock-based, with liquid surface water and biogeochemical cycles that somewhat resemble Earth’s. Water is an important solvent involved in many biological processes. Biogeochemical cycles are the continuous movement and transformation of materials in the environment. These cycles include the circulation of elements and nutrients upon which life and the Earth’s climate depend. Since (as far as we know) all life is carbon-based, a stable carbon cycle is especially important.

The habitable zone is the region around a star in which planets can develop life. Assuming the need for liquid surface water, it follows that most stars around the size of our sun will be able to sustain habitable zones for billions of years. Stars that are larger than the sun are much hotter and bum out more quickly; life there may not have enough time to evolve. Stars that are smaller than the sun have different problem. First of all, planets in their habitable zones will be so close to the star that they will be “tidally locked” – that is one side of the planet will always face the star in perpetual daylight with the other side in the perpetual night. Another possible obstacle to life on smaller stars is that they tend to vary in their luminosity, or brightness, due to flares and “star spots”. The variation can be large enough to have harmful effects on the ecosystem.

Of course, not all stars of the right size will give rise to life; they also must have terrestrial planets with the right kind of orbits. Most solar systems have more than one planet, which influence each other’s orbits with their own gravity. Therefore, in order to have a stable system with no planets flying out into space, the orbits must be a good distance from one another. Interestingly, the amount of space needed is roughly the width of a star’s habitable zone. This means that for life to evolve, the largest possible number of life-supporting planets in any star’s habitable zone is two.

Finally, not all planets meeting the above conditions will necessarily develop life. One major threat is large, frequent asteroid and comet impacts, which will wipe out life each time it tries to evolve. The case of Earth teaches that having large gas giants, such as Saturn and Jupiter,.in the outer part of the solar system can help keep a planet safe for life. Due to their strong gravitation, they tend to catch or deflect large objects before they can reach Earth.
Question:
What is the topic of the passage?

A. The search for intelligent life

B. Conditions necessary for life

C. Characteristics of extraterrestrial life

D. Life in our solar system

1
31 tháng 1 2017

Đáp án B

Kiến thức: Đọc hiểu

Giải thích:

Chủ đề của đoạn văn là gì?

A. Cuộc tìm kiếm cuộc sống thông minh                 B. Điều kiện cần thiết cho sự sống.

C. Đặc điểm của sự sống ngoài Trái đất                   D. Sự sống trong hệ mặt trời của chúng ta.

Thông tin: Exobiology is the study of life that originates from outside of Earth.

Tạm dịch: Sinh học ngoài Trái đất là một nghiên cứu về cuộc sống từ bên ngoài bề mặt Trái Đất

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 questions from 35 to 42.Life in the Universe   Exobiology is the study of life that originates from outside of Earth. As yet, of course, no such life forms have been found. Exobiologists, however, have done important work in the theoretical study of where life is most likely to evolve, and what those extrateưestrial life forms might be like.   What sorts of planets...
Đọc tiếp

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 questions from 35 to 42.

Life in the Universe

   Exobiology is the study of life that originates from outside of Earth. As yet, of course, no such life forms have been found. Exobiologists, however, have done important work in the theoretical study of where life is most likely to evolve, and what those extrateưestrial life forms might be like.

   What sorts of planets are most likely to develop life? Most scientists agree that a habitable planet must be terrestrial, or rock-based, with liquid surface water and biogeochemical cycles that somewhat resemble Earth’s. Water is an important solvent involved in many biological processes. Biogeochemical cycles are the continuous movement and transformation of materials in the environment. These cycles include the circulation of elements and nutrients upon which life and the Earth’s climate depend. Since (as far as we know) all life is carbon-based, a stable carbon cycle is especially important.

   The habitable zone is the region around a star in which planets can develop life. Assuming the need for liquid surface water, it follows that most stars around the size of our sun will be able to sustain habitable zones for billions of years. Stars that are larger than the sun are much hotter and bum out more quickly; life there may not have enough time to evolve. Stars that are smaller than the sun have different problem. First of all, planets in their habitable zones will be so close to the star that they will be “tidally locked” – that is one side of the planet will always face the star in perpetual daylight with the other side in the perpetual night. Another possible obstacle to life on smaller stars is that they tend to vary in their luminosity, or brightness, due to flares and “star spots”. The variation can be large enough to have harmful effects on the ecosystem.

   Of course, not all stars of the right size will give rise to life; they also must have terrestrial planets with the right kind of orbits. Most solar systems have more than one planet, which influence each other’s orbits with their own gravity. Therefore, in order to have a stable system with no planets flying out into space, the orbits must be a good distance from one another. Interestingly, the amount of space needed is roughly the width of a star’s habitable zone. This means that for life to evolve, the largest possible number of life-supporting planets in any star’s habitable zone is two.

   Finally, not all planets meeting the above conditions will necessarily develop life. One major threat is large, frequent asteroid and comet impacts, which will wipe out life each time it tries to evolve. The case of Earth teaches that having large gas giants, such as Saturn and Jupiter,.in the outer part of the solar system can help keep a planet safe for life. Due to their strong gravitation, they tend to catch or deflect large objects before they can reach Earth.

 

What is the topic of the passage?

A. The search for intelligent life 

B. Conditions necessary for life

C. Characteristics of extraterrestrial life

D. Life in our solar system

1
28 tháng 4 2019

Đáp án B

Kiến thức: Đọc hiểu

Giải thích:

Chủ đề của đoạn văn là gì?

A. Cuộc tìm kiếm cuộc sống thông minh

B. Điều kiện cần thiết cho sự sống.

C. Đặc điểm của sự sống ngoài Trái đất

D. Sự sống trong hệ mặt trời của chúng ta.

Thông tin: Exobiology is the study of life that originates from outside of Earth.

Tạm dịch: Sinh học ngoài Trái đất là một nghiên cứu về cuộc sống từ bên ngoài bề mặt Trái Đất

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 questions from 35 to 42.Life in the Universe   Exobiology is the study of life that originates from outside of Earth. As yet, of course, no such life forms have been found. Exobiologists, however, have done important work in the theoretical study of where life is most likely to evolve, and what those extrateưestrial life forms might be like.   What sorts of planets...
Đọc tiếp

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 questions from 35 to 42.

Life in the Universe

   Exobiology is the study of life that originates from outside of Earth. As yet, of course, no such life forms have been found. Exobiologists, however, have done important work in the theoretical study of where life is most likely to evolve, and what those extrateưestrial life forms might be like.

   What sorts of planets are most likely to develop life? Most scientists agree that a habitable planet must be terrestrial, or rock-based, with liquid surface water and biogeochemical cycles that somewhat resemble Earth’s. Water is an important solvent involved in many biological processes. Biogeochemical cycles are the continuous movement and transformation of materials in the environment. These cycles include the circulation of elements and nutrients upon which life and the Earth’s climate depend. Since (as far as we know) all life is carbon-based, a stable carbon cycle is especially important.

   The habitable zone is the region around a star in which planets can develop life. Assuming the need for liquid surface water, it follows that most stars around the size of our sun will be able to sustain habitable zones for billions of years. Stars that are larger than the sun are much hotter and bum out more quickly; life there may not have enough time to evolve. Stars that are smaller than the sun have different problem. First of all, planets in their habitable zones will be so close to the star that they will be “tidally locked” – that is one side of the planet will always face the star in perpetual daylight with the other side in the perpetual night. Another possible obstacle to life on smaller stars is that they tend to vary in their luminosity, or brightness, due to flares and “star spots”. The variation can be large enough to have harmful effects on the ecosystem.

   Of course, not all stars of the right size will give rise to life; they also must have terrestrial planets with the right kind of orbits. Most solar systems have more than one planet, which influence each other’s orbits with their own gravity. Therefore, in order to have a stable system with no planets flying out into space, the orbits must be a good distance from one another. Interestingly, the amount of space needed is roughly the width of a star’s habitable zone. This means that for life to evolve, the largest possible number of life-supporting planets in any star’s habitable zone is two.

   Finally, not all planets meeting the above conditions will necessarily develop life. One major threat is large, frequent asteroid and comet impacts, which will wipe out life each time it tries to evolve. The case of Earth teaches that having large gas giants, such as Saturn and Jupiter,.in the outer part of the solar system can help keep a planet safe for life. Due to their strong gravitation, they tend to catch or deflect large objects before they can reach Earth.

 

The word “sustain” in paragraph 3 could best be replaced by

A. assist 

B. have 

C. need 

D. experience

1
30 tháng 5 2019

Đáp án B

Kiến thức: Đọc hiểu

Từ "sustain" trong đoạn 3 có thể được thay thế bằng từ:

A. có thể có

B. có

C. cần   

D. kinh nghiệm

Thông tin: … It follows that most stars around the size of our sun will be able to sustain habitable zones…

Tạm dịch: Theo đó, hầu hết các ngôi sao xung quanh vùng mặt trời của chúng ta sẽ có thể có khu vực sống được…

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 questions from 35 to 42.Life in the UniverseExobiology is the study of life that originates from outside of Earth. As yet, of course, no such life forms have been found. Exobiologists, however, have done important work in the theoretical study of where life is most likely to evolve, and what those extrateưestrial life forms might be like.What sorts of planets are most...
Đọc tiếp

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 questions from 35 to 42.

Life in the Universe

Exobiology is the study of life that originates from outside of Earth. As yet, of course, no such life forms have been found. Exobiologists, however, have done important work in the theoretical study of where life is most likely to evolve, and what those extrateưestrial life forms might be like.

What sorts of planets are most likely to develop life? Most scientists agree that a habitable planet must be terrestrial, or rock-based, with liquid surface water and biogeochemical cycles that somewhat resemble Earth’s. Water is an important solvent involved in many biological processes. Biogeochemical cycles are the continuous movement and transformation of materials in the environment. These cycles include the circulation of elements and nutrients upon which life and the Earth’s climate depend. Since (as far as we know) all life is carbon-based, a stable carbon cycle is especially important.

The habitable zone is the region around a star in which planets can develop life. Assuming the need for liquid surface water, it follows that most stars around the size of our sun will be able to sustain habitable zones for billions of years. Stars that are larger than the sun are much hotter and bum out more quickly; life there may not have enough time to evolve. Stars that are smaller than the sun have different problem. First of all, planets in their habitable zones will be so close to the star that they will be “tidally locked” – that is one side of the planet will always face the star in perpetual daylight with the other side in the perpetual night. Another possible obstacle to life on smaller stars is that they tend to vary in their luminosity, or brightness, due to flares and “star spots”. The variation can be large enough to have harmful effects on the ecosystem.

Of course, not all stars of the right size will give rise to life; they also must have terrestrial planets with the right kind of orbits. Most solar systems have more than one planet, which influence each other’s orbits with their own gravity. Therefore, in order to have a stable system with no planets flying out into space, the orbits must be a good distance from one another. Interestingly, the amount of space needed is roughly the width of a star’s habitable zone. This means that for life to evolve, the largest possible number of life-supporting planets in any star’s habitable zone is two.

Finally, not all planets meeting the above conditions will necessarily develop life. One major threat is large, frequent asteroid and comet impacts, which will wipe out life each time it tries to evolve. The case of Earth teaches that having large gas giants, such as Saturn and Jupiter,.in the outer part of the solar system can help keep a planet safe for life. Due to their strong gravitation, they tend to catch or deflect large objects before they can reach Earth.

The word “sustain” in paragraph 3 could best be replaced by

A. assist

B. have

C. need

D. experience

1
4 tháng 2 2019

Đáp án B

Kiến thức: Đọc hiểu

Từ "sustain" trong đoạn 3 có thể được thay thế bằng từ:

A. có thể có          B. có

C. cần                             D. kinh nghiệm

Thông tin: … It follows that most stars around the size of our sun will be able to sustain habitable zones…

Tạm dịch: Theo đó, hầu hết các ngôi sao xung quanh vùng mặt trời của chúng ta sẽ có thể có khu vực sống được…