Compare and contrast the formation of hail and sleet

What will be an ideal response?


Answer: Hail consists of multiple layers of ice that are usually no more than a few millimeters in thickness, but under extreme circumstances can achieve sizes comparable to softballs. Hailstones are often relatively concentric, though some have irregular shapes. No other type of precipitation is capable of producing drops or particles nearly as large as hail. Hail development begins with the formation of a small particle called an embryo, usually consisting of graupel, in a region of cloud where supercooled droplets coexist with ice crystals. The cumulonimbus clouds that produce hail do not have uniformly strong updrafts across their entire width; they have localized areas of extremely violent vertical motions surrounded by zones of relatively weak updrafts. Hail growth typically begins just outside these intense updrafts. Some developing hailstones get blown from the edge of the strong updrafts into the core, where they are rapidly taken to the upper reaches of the cloud and ejected. When this happens the stones do not have time to accumulate large amounts of ice, so they fall from the cloud as relatively small hail. Sleet forms when raindrops freeze in the air while falling.

Environmental & Atmospheric Sciences

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Clouds play an important role in the earth's energy budget because they:

A) absorb longwave radiation and re-radiate it towards the surface. B) cool the air around them. C) reflect solar energy. D) reflect the earth's infrared energy. E) Both A and C

Environmental & Atmospheric Sciences

Compare the Taconic, Caledonian, and Acadian orogenies in terms of the tectonic forces that caused them and the

sedimentary features that resulted. What will be an ideal response?

Environmental & Atmospheric Sciences

What marks the limit of rapid marine erosion?

a. Sea cliffs b. Wave-cut platforms c. Sea caves d. Blowholes

Environmental & Atmospheric Sciences

If a parcel of air is capable of holding 36 grams per cubic meter but it only contains 9 grams per cubic meter, then its relative humidity would be _____ percent

a. 4 b. 9 c. 25 d. 36

Environmental & Atmospheric Sciences