Which of the following North American environmental disasters happened first?
A) The Dust Bowl
B) The near extinction of American Bison
C) A massive flood of the Mississippi River, which killed hundreds.
D) Heavy air pollution over the industrial region around Pittsburg Pennsylvania
B
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The half-life of radioactive parent isotope Q is 1000 million years. Scientists testing a rock sample discover that the sample contains three times as many daughter isotopes as parent isotopes. What is the age of the rock?
- 1,000 million years
- 2,000 million years
- 3,000 million years
- 4,000 million years
According to environmental determinism,
A) the physical environment causes different types of social and cultural development. B) the physical environment sets loose limits on cultural and social actions. C) people cannot adjust to different physical environments because of cultural traditions. D) people can choose a course of action from many alternatives offered by the physical environment, and they can also engage in cultural behaviors that seem contradictory to the environment. E) people determine their physical environment.
Which of the following statements is true?
A) Carbon tetrachloride, CCl4 was once widely used as a degreasing solvent. B) Carbon tetrachloride, CCl4 is both toxic and carcinogenic. C) Dichloromethane CH2Cl2 is currently a widely used organic solvent. D) All three statements are true.
At which of the following cities can cirrus clouds be observed at an altitude of 3000 metres above the surface?
A. Calgary, Alberta B. Vancouver, British Columbia C. Toronto, Ontario D. Whitehorse, Yukon