In which of the following atmospheric layers is the ozone hole located?
A. stratosphere
B. ionosphere
C. thermosphere
D. troposphere
Answer: A
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Which of the following situations provides an example of a "back door" cold front?
A. a cold front moving into British Columbia from the Pacific Ocean B. a cold front moving into the desert southwest from northern Mexico C. a cold front moving into the Maritimes from the Atlantic Ocean D. a cold front moving in a clockwise direction around a low pressure centre
What is Global Change?
a. Global variation of climate b. Global variation of Earth's landscapes c. Transformations or modifications of physical and biological components in the Earth System through time d. Both a and b
Though Oxisols occur in the tropical rain forests, they tend to be poor in inorganic nutrients
Indicate whether the statement is true or false
____ lasts from sunset until the sun is 6° below the horizon
a. Astronomical twilight b. Civil twilight c. White night d. Nightlong twilight e. Summer twilight