TPO33-L2 Colorado’s water
Listen to part of a lecture in an environmental science class.
- What is the lecture mainly about?
- A. The use of tree rings to measure water usage rates.
- B. Collecting data that are useful for planning water distribution.
- C. Investigating the history of water use in the Colorado River basin.
- D. The need for more government involvement in water distribution.
- What does the student find surprising about the 1922 water-sharing agreement?
- A. It was based on only twenty years of data.
- B. It was approved by all seven states in the region.
- C. It was meant to remain in effect for more than 100 years.
- D. It was based on data from outside the Colorado River basin.
- According to the professor, what was the problem with the data recorded before the 1970s?
- A. The data were recorded on old instruments.
- B. The recorded data and human observation did not match.
- C. There were gaps in the recorded data.
- D. The data did not reflect the historical changes in the flow of the Colorado River.
- What assumption did researchers use to draw conclusions about the Colorado River basin?
- A. Ancient tree ring data can only be obtained from dead trees.
- B. The climate in an area tends to remain constant over time.
- C. Rainfall has a limited impact on water flowing in rivers.
- D. Width of tree rings can correspond to the amount of moisture in an area.
- What does the professor imply when he describes the early to mid-1900s as the wettest period for the Colorado River in 400 years?
- A. The climate in the Colorado River basin will become wetter in the future.
- B. The 1922 agreement was based on overestimated average river flows.
- C. Water flowing in the Colorado River rises and falls at a predictable rate.
- D. Human activity caused climate change in the Colorado River basin.
- What is the professor’s attitude toward future water-management plans in the Colorado River basin?
- A. He believes better methods for collecting data need to be developed.
- B. He does not believe water management will be a concern in the immediate future.
- C. He is optimistic that new data will lead to better planning.
- D. He is not certain all scientists understand the current condition of the Colorado River.
B A D D B C