Asked by Andy Blackwell Uncategorized
What causes layers to form in hail?
We need you to answer this question!
If you know the answer to this question, please register to join our limited beta program and start the conversation right now!
Asked in Mountains, Volcanoes, Plate Tectonics
What causes a secondary peak to form from a volcano?
Asked in Geology
What process causes minerals to form from bodies of water?
Asked in Earth Sciences
Pressure from water and top layers over thousands of years causes lower layers to stick together and form what?
Asked in Chemistry
What causes different liquids to form layers when they are poured into a container?
Asked in Chemistry, Earth Sciences
Why do lumps of hail have alternating layers of clear and opaque ice?
Asked in Clouds
When water falls from clouds what forms can it take?
Asked in Thunderstorms and Lightning, Clouds
Why hail stones are formed?
Every hailstone begins to form as an ice nucleus, a small cluster of supercooled water droplets or clumps of snow. This center is called a graupel, and it may continue to accumulate ice, melt in the thundercloud and turn to rain, or be smashed apart by other graupels. If a bug, piece of bark, seed, or stick gets blown up into the storm cloud, it creates another possible nucleus for a hailstone. If the thunderstorm is cold and windy enough, this graupel will accumulate layers of ice the way a dipped candle accumulates layers of wax, through a process called accretion. Opaque, whitish layers form when icy droplets trap air bubbles and stick to the graupel. Clear layers have accreted large drops of supercooled water that freeze when they encounter the hailstone. Of course, much larger hailstones can be made when two smaller ones freeze together. Hail can accrete more layers when the hailstone blows up through layers of the thunderstorm. Even heavy hail will be kept aloft by strong enough updraughts. When the hail falls back through the storm due to gravity, it accretes even more layers, until it is so heavy it falls as precipitation. Hail forms in most tall, cumulonimbus storms that reach the colder upper atmosphere, but not all hail survives its trip once out of the thunderstorm. The size of hail, once fully formed, varies from pinheads to softballs. A few outer layers frequently melt when the hail mixes with other warmer precipitation such as snow and rain. The National Weather Service has official size categories for hail that are useful for gauging the damage they can cause to crops. How hail forms gives us a window into the interior of a thunderstorm, helping meteorologists study the evolution of storms as well.
Asked in Plate Tectonics
What is the force that causes rock layers to crumple and fold?