How does hail form? What factors govern the ultimate size of hailstones?
What will be an ideal response?
Hail is hard, rounded pellets of precipitation that form in large cumulonimbus clouds during thunderstorm activity. Ice pellets grow by collecting supercooled water as they fall through the cloud, then are sent back up again with updrafts to collect more supercooled water as they fall back down. Eventually, they grow too heavy to be carried up again and fall to the ground as hailstones. The size of hailstones is governed by the strength of updrafts and the presence of droplets in the air surrounding the hailstone that can add to its size via collisions.
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The value of total outputs of goods and services in a year in a country is its
A) level of development. B) gross domestic product. C) productivity. D) value added.
For fear of perpetuating bad habits, international finance organizations require poor countries to undergo structural adjustment as a condition for debt relief
Indicate whether the statement is true or false.
A very hard, non-foliated metamorphic rock composed microscopically small crystals is classified as a(n)
A) amphibolite. B) greenstone. C) slate. D) hornfels.