What causes meteor showers such as those that occur near August 12?
A. Bursts of particles ejected from the Sun
B. A comet being captured into orbit around the Earth
C. The Earth passing through the trail of debris left by a comet
D. The breakup of an asteroid in our upper atmosphere
Answer: C
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Which of the following Significant World earthquakes caused no casualties and little impact?
a. Alaska, U.S.A. 2002 b. Tangshan, China 1976 c. Loma Prieta, California, U.S.A. 1989 d. Kobe, Japan 1995 e. Christchurch, New Zealand 2011
What is the order for where you would find stream deposits starting at the headwaters and going toward the mouth?
A. silt, sand, gravel B. sand, silt, gravel C. gravel, sand, silt
Ozone is important to humans because it ________
A) reflects solar rays that would cause global warming B) absorbs infrared radiation which is harmful to humans C) absorbs ultraviolet radiation with is harmful to humans D) passes solar rays that would maintain our present climate range E) is a pollutant that is harmful to humans
What makes it possible for the coexistence of several warbler species that feed on the same insect larvae?
A) The birds eat in the same portion of different evergreens. B) Some of the warblers are diurnal and some nocturnal. C) The warblers do not experience intraspecies competition. D) The birds eat in the same area of different fir and spruce trees. E) The birds eat in the different portions of the forest canopy.