Researchers believe the catalyst for the 1982-83 El Niño event was actually the volcanic eruption of El
Chichón. Indicate whether the statement is true or false.
ANS: T
This volcanic eruption released huge quantities of gas and dust into the atmosphere. This obscured the
amount of sun radiation reaching the surface of Earth. Information can be found in the section El Niño
and La Niña Are Exceptions to Normal Wind and Current Flow.
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Differences in the census dates of different countries makes cross-national comparisons difficult
Indicate whether this statement is true or false.
Which of the following statements gives an important reason for the large daily temperature range over deserts?
A. Free convection cells are unable to form above the hot desert ground. B. Dry air is a very poor heat conductor. C. There is little water vapour in the air to absorb and re-radiate infrared radiation. D. The light coloured sand radiates heat very rapidly at night.
Which of the following combinations represents an accurate association between scale and wind type?
A. microscale and chinook wind B. mesoscale and land breeze C. synoptic scale and sea breeze D. planetary scale and lake breeze
The basins of the Great Lakes were carved by running water during interglacial periods. Indicate whether the statement is true or false