In geologic history, mass extinctions have been followed by an increase in species diversity.
Answer the following statement true (T) or false (F)
True
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How much nitrogen occupies a volume of air near the Earth's surface?
A. 78% B. 84% C. 43% D. 21%
An instrument used to record vibrations in the crust is the
A) tiltmeter. B) the Richter scale. C) seismometer. D) land barometer.
Why did the Latter-day Saints decide to settle in such an isolated part of North America after being forced to leave their settlement in Illinois?
What will be an ideal response?
In terms of long-term temperature increases in the atmosphere, which of the following is TRUE?
A) Average global temperature has risen 5°C in the 20th century. B) No changes have been observed in the 21st century. C) The greenhouse effect has never been shown to be real. D) Increases in greenhouse gases have been observed. E) It appears that we can readily curb the carbon dioxide problem.