TPO20L2 Interglacial Periods (Environmental Science)

音频

题目

1.What is the lecture mainly about?

A. The effect of ice ages on the development of agriculture

B. A theory about a change in Earth’s climate cycle

C. Strategies to prevent Earth from entering another ice age

D. Some effects of industrialization on Earth’s atmosphere

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2.What does the professor imply about Earth’s climate over the last several million years? [Click on two answers.]

A. Ice ages have alternated with warmer periods.

B. Recent ice ages have not been as cold as earlier ice ages.

C. Interglacial periods have become cooler and cooler over time.

D. Previous interglacial periods were shorter than the current interglacial period.

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3.According to the professor, what factor is extending the duration of the current interglacial period?

A. A shift in the locations of wetlands and forests

B. The relatively mild temperatures of the most recent ice ages

C. The increased absorption of certain atmospheric gases by farm crops

D. An increase in the quantity of certain gases in Earth’s atmosphere

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4.According to the professor, what activities associated with the beginnings of agriculture may have slowed or prevented the onset of a predicted ice age?[Click on two answers.]

A. The clearing of trees

B. The burning of fossil fuels

C. The domestication of certain animals

D. The cultivation of certain grains

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5.What is the professor’s attitude toward industrialization?

A. He thinks that its effect on Earth’s climate will decrease over time.

B. He is worried that it may speed the arrival of the next ice age.

C. He thinks that it may reduce the effect of agriculture on Earth’s climate.

D. He is unsure about its long-term effects on Earth’s climate.

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6.What does the professor imply when he says this:

A. Theorists sometimes make careless predictions

B. Theorists were unaware of some of the effects of human activities.

C. Technology of the 1970s was not sophisticated enough to detect the earliest stages of an ice age.

D. Scientists in the1970s overestimated the speed at which ice ages progress.


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