Present the typical conditions and activities associated with both a cold front and with a warm front
What will be an ideal response?
A cold front is the leading edge of a cold air mass, whereas a warm front is the leading edge of a warm air mass. A cold front is more homogeneous and denser than the warm air mass it displaces. It causes warm air ahead of the advancing air mass to rise abruptly. Several days before its arrival, high cirrus clouds appear. As it advances, more intense lifting results, cumulonimbus clouds may form, and heavy precipitation may results. The aftermath is north winds in the northern hemisphere and anticyclonic conditions. A warm front may be carried by the jet stream into regions with colder air. The leading edge of a warm front is unable to displace cooler, passive air. Instead, the warm air tend to push the cooler, underlying air into a wedge shape, with the warmer air sliding over the cooler air, creating a temperature inversion.
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Which two nations in the region gain significant revenue from foreign tourists but have seen the number of visitors fall in recent years due to political instability?
A) Syria and Lebanon B) Saudi Arabia and Yemen C) Lebanon and Libya D) Egypt and Turkey E) Iran and Iraq
Nearly all of the energy available on Earth comes from the ________
Fill in the blank(s) with the appropriate word(s).
India and the United Kingdom have approximately the same arithmetic density although their landscapes and sizes are quite different. From this we can conclude that the two countries have roughly the same
A) level of output per farmer. B) number of people per area of land. C) pressure placed by people on the land to produce food. D) number of farmers per area of land. E) number of people per area of arable land.
When a mass of cold air collides with a mass of warm air, what happens?
A) The cold air rises above the warm air. B) The warm air rises above the cold air. C) The boundary between the two air masses keeps them separate, and they do not interact in any way. D) The cold air is warmed and the warm air is cooled by their mixing.