A gas threatening Earth's ozone layer is
A) sulfur dioxides.
B) chlorofluorocarbons.
C) the greenhouse effect.
D) photochemical smog.
E) nitrous oxide.
Answer: B
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Which of the following statements describes pressure at the centre of a hurricane?
A. It is lower than the surroundings at the surface and higher than the surroundings aloft. B. It is lower than the surroundings at the surface and lower than the surroundings aloft. C. It is higher than the surroundings at the surface and lower than the surroundings aloft. D. It is higher than the surroundings at the surface and higher than the surroundings aloft.
Small fragments of what were once larger organisms are called trace fossils. Indicate whether the statement is true or false
Although it is difficult to get a precise number of active volcanoes, a common estimate is about ____
A)100 B)250 C)550 D)1100 E)2000
Investing in companies in a foreign country, with the purpose of managerial and production control is known as ________ ________ ________
Fill in the blank(s) with correct word