Which seismic waves are released first during an earthquake?
A) P waves
B) S waves
C) L waves
D) R waves
Answer: A
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One inch equals one mile, or 1/63,360. If your map scale was "one inch equals seven miles" what would be the representative fraction?
A) 1/443,520 B) 1/7000 C) 1/7 D) 1/63,360 E) 1/63,360 times seven
Which of the following statements is true about a climax community?
It is the community that will develop after an intense disturbance It is the community that will develop after a long stable period of time It is the very first community to colonize bare rock or soil It is the highest number of animals at the top of the food web
The UV filtering effect of the ozone layer is beneficial because it ____.
A. allows humans and other forms of life to exist on land B. prevents low energy radiation from reaching the earth's surface C. counteracts global warming D. prevents the formation of photochemical ozone in the stratosphere E. reduces the amount of water vapor in the troposphere
An El Nino is fully in place when:
A. as dispersing water spreads away from the equator on the western coast of South America. B. as dispersing water spreads away from the equator on the eastern coast of South America. C. the leading edge of the Kelvin wave reaches the eastern coast of South America. D. the leading edge of the Kelvin wave reaches the western coast of South America.