What is the primary source of the CFCs that deplete ozone in the stratosphere?
A. coolants for refrigerators
B. ozone from photochemical reactions
C. emissions from smelters
D. particles from burning the rain forests
Answer: A
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In lakes, the nutrient-rich water near the shore is part of the
a. limnetic zone b. benthic zone c. littoral zone d. profundal zone e. abyssal zone
The coordinates 150 E longitude, 89 N latitude are
A) near both the International Date Line and the North Pole. B) near the equator but quite far from the prime meridian. C) near the International Date Line and the equator. D) near the North Pole and the prime meridian. E) near both the Tropic of Cancer and the International Date Line.
Answer this question that relates to the sea level change graph below.
What happened to cause the graph to rise from its position 11,000 years ago to where it is at present?
A. Glaciers melted releasing large volumes of water. B. Excessive rains caused sea level to rise. C. More evaporation began occurring that increased runoff.
A ________ is an intrusive, igneous rock body that is tabular and concordant
A) dike B) laccolith C) pluton D) sill