When an alpine glacier flows through a valley, it makes the valley wider by
A. plucking.
B. abrasion.
C. deposition.
D. dissolving.
Answer: A
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In which of the following locations do squall lines generally form?
A. ahead of an advancing cold front B. along a warm front C. in the cold sector where warm, dry air meets warm, humid air D. at the centre of low pressure
Wilderness areas ________
A) are biosphere reserves managed by UNESCO B) were set up under the administration of George W. Bush in the early 2000s C) allow hunting as long as proper permits are acquired D) were set up under the wise-use movement of the 1980s and 1990s E) are off-limits to development of any kind but are open to low-impact recreation
Molten salt systems allow solar thermal power plants to produce electricity around the clock.
Answer the following statement true (T) or false (F)
If you were between 40° and 50° north latitude, and you wanted to stand with the average winds blowing in your face you would stand facing
A) west. B) east. C) north. D) south.