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 Scientists have discovered that for the last 160,000 years, at least, there has been a consistent relationship between the amount of carbon dioxide in the air and the average temperature of the planet. The importance of carbon dioxide in regulating the Earth's temperature was confirmed by scientists working in eastern Antarctica. Drilling ...
Phạm Minh Trí | Chat Online | |
04/09 11:53:59 (Tiếng Anh - Lớp 12) |
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
Scientists have discovered that for the last 160,000 years, at least, there has been a consistent relationship between the amount of carbon dioxide in the air and the average temperature of the planet. The importance of carbon dioxide in regulating the Earth's temperature was confirmed by scientists working in eastern Antarctica. Drilling down into a glacier, they extracted a mile-long cylinder of ice from the hole. The glacier had formed as layer upon layer of snow accumulated year after year. Thus, drilling into the ice was tantamount to drilling back through time.
The deepest sections of the core are composed of water that fell as snow 160,000 years ago. Scientists in Grenoble, France, fractured portions of the core and measured the composition of ancient air released from bubbles in the ice. Instruments were used to measure the ratio of certain isotopes in the frozen water to get an idea of the prevailing atmospheric temperature at the time when that particular bit of water became locked in the glacier.
The result is a remarkable unbroken record of temperature and of atmospheric levels of carbon dioxide. Almost every time the chill of an ice age descended on the planet, carbon dioxide levels dropped. When the global temperature dropped 9°F (5°C), carbon dioxide levels dropped to 190 parts per million or so. Generally, as each ice age ended and the Earth basked in a warm interglacial period, carbon dioxide levels were around 280 parts per million. Through the 160,000 years of that ice record, the level of carbon dioxide in the atmosphere fluctuated between 190 and 280 parts per million, but never rose much higher until the Industrial Revolution beginning in the eighteenth century and continuing today.
There is indirect evidence that the link between carbon dioxide levels and global temperature change goes back much further than the glacial record. Carbon dioxide levels may have been much greater than the current concentration during the Carboniferous period, 360 to 285 million years ago. The period was named for a profusion of plant life whose buried remains produced a large fraction of the coal deposits that are being brought to the surface and burned today
Which of the following does the passage mainly discuss
Lựa chọn một trả lời để xem Đáp án chính xác Báo sai đáp án hoặc câu hỏi |
A. Chemical causes of ice ages 0 % | 0 phiếu |
B. Techniques for studying ancient layers of ice in glaciers 0 % | 0 phiếu |
C. Evidence of a relationship between levels of carbon dioxide and global temperature 0 % | 0 phiếu |
D. Effects of plant life on carbon dioxide levels in the atmosphere 0 % | 0 phiếu |
Tổng cộng: | 0 trả lời |
Trắc nghiệm liên quan
- 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 30 to 34 As computer use becomes more common, the need for security is more common than ever. One of ... (Tiếng Anh - Lớp 12)
- 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 30 to 34 As computer use becomes more common, the need for security is more common than ever. One of ... (Tiếng Anh - Lớp 12)
- 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 30 to 34 As computer use becomes more common, the need for security is more common than ever. One of ... (Tiếng Anh - Lớp 12)
- 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 30 to 34 As computer use becomes more common, the need for security is more common than ever. One of ... (Tiếng Anh - Lớp 12)
- 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 30 to 34 As computer use becomes more common, the need for security is more common than ever. One of ... (Tiếng Anh - Lớp 12)
- Read the following passage and mark the letter A, B, C, or D on your answer sheet to choose the word or phrase that best fits each of the numbered blanks from 25 to 29 Prime Minister Nguyen Xuan Phuc has delivered Vietnam’s strong message, ... (Tiếng Anh - Lớp 12)
- Read the following passage and mark the letter A, B, C, or D on your answer sheet to choose the word or phrase that best fits each of the numbered blanks from 25 to 29 Prime Minister Nguyen Xuan Phuc has delivered Vietnam’s strong message, ... (Tiếng Anh - Lớp 12)
- Read the following passage and mark the letter A, B, C, or D on your answer sheet to choose the word or phrase that best fits each of the numbered blanks from 25 to 29 Prime Minister Nguyen Xuan Phuc has delivered Vietnam’s strong message, ... (Tiếng Anh - Lớp 12)
- Read the following passage and mark the letter A, B, C, or D on your answer sheet to choose the word or phrase that best fits each of the numbered blanks from 25 to 29 Prime Minister Nguyen Xuan Phuc has delivered Vietnam’s strong message, ... (Tiếng Anh - Lớp 12)
- Read the following passage and mark the letter A, B, C, or D on your answer sheet to choose the word or phrase that best fits each of the numbered blanks from 25 to 29 Prime Minister Nguyen Xuan Phuc has delivered Vietnam’s strong message, ... (Tiếng Anh - Lớp 12)
Trắc nghiệm mới nhất
- Về vị trí địa lí, Việt Nam nằm ở phía nào của bán đảo Đông Dương?
- Nước ta có chung đường biển với nước nào sau đây?
- HIEUTHUHAI sinh năm bao nhiêu?
- Cho bát giác đều \[ABCDEFGH\] có tâm \[O.\] Phép quay thuận chiều \[135^\circ \] tâm \[O\] biến điểm \[D\] của bát giác đều \[ABCDEFGH\] thành điểm nào? (Toán học - Lớp 9)
- Một lục giác đều và một ngũ giác đều chung cạnh \[AD\] (như hình vẽ). Số đo góc \(BAC\) là (Toán học - Lớp 9)
- III. Vận dụng Cho lục giác đều \[ABCDEF\] tâm \[O.\] Gọi \[M,{\rm{ }}N\] lần lượt là trung điểm của \[EF,{\rm{ }}BD.\] Khẳng định nào sau đây là sai? (Toán học - Lớp 9)
- Cho hình ngũ giác đều \[ABCDE\] tâm \[O\]. Phép quay thuận chiều tâm \[O\] biến điểm \[A\] thành điểm \[E\] thì điểm \[C\] biến thành điểm (Toán học - Lớp 9)
- Cho hình thoi \[ABCD\] có góc \(\widehat {ABC} = 60^\circ \). Phép quay thuận chiều tâm \[A\] một góc \(60^\circ \) biến cạnh \[CD\] thành (Toán học - Lớp 9)
- Cho tam giác đều tâm \[O\]. Số phép quay thuận chiều tâm \[O\] góc α với \[0^\circ \le \alpha < 360^\circ \], biến tam giác trên thành chính nó là > (Toán học - Lớp 9)
- Cho hình vuông tâm \[O\]. Số phép quay thuận chiều tâm \[O\] góc α với \[0^\circ \le \alpha < 360^\circ \], biến hình vuông trên thành chính nó là (Toán học - Lớp 9)