Directions: • Listen to the lecture and take notes . Scan the QR code to listen to the audio track . • Listen to the questions and answer them . Scan the QR code to listen to the audio track . • Check your answers using the answer key at the end of this section . • Listen to the lecture again, focusing on understanding the information related to the questions you didn’t answer correctly. 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
2. What does the professor imply about Earth’s climate over the last several million years? Select 2 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
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 age
C. The increased absorption of certain atmospheric gases by farm crops D. An increase in the quantity of certain gases in Earth’s atmosphere
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? Select 2 answers. A. The clearing of trees B. The burning of fossil fuels C. The domestication of certain animals D. The cultivation of certain grains
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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