Suppose a 500 mb chart valid today at 12 z indicates a large trough over the eastern us and a large ridge over the western us. an aircraft, flying in the vicinity of 18,000 ft altitude from west to east over the us at 12 z today, will altitude if the altimeter is not corrected.

The arctic is a cold deset biome, which one of the answers is not correct? a) animals in cold deserts burrow to get out of the harsh climates. b) vegetation in cold deserts is normally shallow rooted small shrubs. c) animals in cold deserts hibernate most of the year to get out of the cold. d) soils are very heavy and course. e) the region receives less than 10 inches of precipitation annually.