Assuming that humans went extinct today, do you think that they would be good index fossils? Why or why not?
What will be an ideal response?
Answer: Yes. Modern humans have only existed for 100,000 years and are geographically widespread.
Environmental & Atmospheric Sciences
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Air becomes unhealthy when the air quality index (AQI) exceeds ____
A) 1 B) 3 C) 10 D) 100
Environmental & Atmospheric Sciences
When a layer or warm air is trapped between layers of cool air above and below, it illustrates
A) a temperature inversion. B) stratospheric smog. C) the greenhouse effect. D) how high levels of ozone affect climate near the ground.
Environmental & Atmospheric Sciences
Mudflows frequently occur on young volcanoes covered with ash.
Answer the following statement true (T) or false (F)
Environmental & Atmospheric Sciences
Even the most powerful twisters seldom have winds exceeding ____ knots.?
a. ?90 b. ?125 c. ?220 d. ?300 e. ?410
Environmental & Atmospheric Sciences