Learning Object (Avellana & Eslao)

Objective After working on this learning object, you should be able to identify and describe the different types of clouds that are grouped accordingly: 1. Low Clouds 2. Medium Clouds 3. High Clouds 4. Clouds with Vertical Development >

Clouds The process of condensation results in the formation of clouds. Cloud watching is fun, because different clouds form under different circumstances. > <

Condensation Attribution 2.0 Generic (CC BY 2.0) Water vapor in the air gets cold and changes back into liquid, forming clouds. This is called condensation. To see condensation in action, put a large (at least 8 ½ x 11) piece of cardboard (a book will work) in the freezer for about an hour. Now, take the boiling kettle of water and hold the cold book about 1 foot over the spout (right in the steam...wear oven mitts). Water droplets will form on the book. That's condensation! :) > <

Stratus Clouds Stratus clouds are uniform grayish clouds that often cover the entire sky. They resemble fog that does not reach the ground. Usually no precipitation falls from stratus clouds, but sometimes they may drizzle. When a thick fog "lifts," the resulting clouds are low stratus. > <

Nimbostratus Clouds Nimbostratus clouds form a dark gray, "wet" looking cloudy layer associated with continuously falling rain or snow. They often produce precipitation that is usually light to moderate. > <

Altocumulus Clouds Altocumulus clouds are middle level clouds that are made of water droplets and appear as gray, puffy masses, sometimes rolled out in parallel waves or bands. The appearance of these clouds on a warm, humid summer morning often means thunderstorms may occur by late afternoon. > <

Altostratus Clouds Altostratus clouds are gray or blue-gray middle level clouds composed of ice crystals and water droplets. These clouds usually cover the entire sky. In the thinner areas of the cloud, the sun may be dimly visible as a round disk. Altostratus clouds often form ahead of storms that will produce continuous precipitation. > <

Cirrus Clouds Cirrus clouds are thin, wispy clouds blown by high winds into long streamers. They are considered "high clouds" forming above 6000 m (20,000 ft). Cirrus clouds usually move across the sky from west to east. They generally mean fair to pleasant weather. > <

Cirrostratus Clouds Cirrostratus clouds are thin, sheetlike high clouds that often cover the entire sky. They are so thin that the sun and moon can be seen through them. > <

Cirrocumulus Clouds Cirrocumulus clouds appear as small, rounded white puffs. The small ripples in the cirrocumulus sometimes resemble the scales of a fish. A sky with cirrocumulus clouds is sometimes referred to as a "mackerel sky." > <

Clouds with Vertical Development > <

Cumulus Clouds Cumulus clouds are puffy clouds that sometimes look like pieces of floating cotton. The base of each cloud is often flat and may be only 1000 m (330 ft) above the ground. The top of the cloud has rounded towers. When the top of the cumulus resembles the head of a cauliflower, it is called cumulus congestus or towering cumulus. These clouds grow upward, and they can develop into a giant cumulonimbus, which is a thunderstorm cloud. > <

Cumulonimbus Clouds Cumulonimbus clouds are thunderstorm clouds that form if cumulus congestus clouds continue to grow vertically. Their dark bases may be no more than 300 m (1000 ft) above the Earth's surface. Their tops may extend upward to over 12,000 m (39,000 ft). Tremendous amounts of energy are released by the condensation of water vapor within a cumulonimbus. Lightning, thunder, and even violent tornadoes are associated with the cumulonimbus. > <

Remember: a > < If “nimbo” appears at the beginning and “nimbus” appears at the end of a cloud name, it mens that it is a rain cloud .

Now, let's check if you learned. > Click “>” if you're ready. Click “<” if you want to review from the start. <

Just click the letter of your answer. Click to start!

1. This is the process where w ater vapor in the air gets cold and changes back into liquid, forming clouds . a. Evaporation b. Condensation c. Precipitation

CORRECT! :) Proceed to the next item.

Uh-oh.. Maybe we should go back to that item. Return to previous item.

2. Stratus clouds belong to this group of clouds. a. Low Clouds b. Medium Clouds c. High Clouds d. Clouds with Vertical Development

3. These are thin, sheet-like high clouds that often cover the entire sky. They are so thin that the sun and moon can be seen through them. a. Cirrostratus b. Cirrocumulus c. Cirrus

4. Cumulus clouds belong to this group of clouds. a. Low Clouds b. Medium Clouds c. High Clouds d. Clouds with Vertical Development

5. These are middle level clouds that are made of water droplets and appear as gray, puffy masses, sometimes rolled out in parallel waves or bands. The appearance of these clouds on a warm, humid summer morning often means thunderstorms may occur by late afternoon. a. Altostratus b. Cumulonimbus c. Altocumulus

6. Cirrus clouds belong to this group of clouds. a. Low Clouds b. Medium Clouds c. High Clouds d. Clouds with Vertical Development

7. These are clouds that appear as small, rounded white puffs. The small ripples in the cirrocumulus sometimes resemble the scales of a fish. A sky with cirrocumulus clouds is sometimes referred to as a "mackerel sky.“ a. Cirrocumulus b. Cirrostratus c. Altocumulus

8. Nimbostratus clouds belong to this group of clouds. a. Low Clouds b. Medium Clouds c. High Clouds d. Clouds with Vertical Development

9. These are puffy clouds that sometimes look like pieces of floating cotton. The base of each cloud is often flat and may be only 1000 m (330 ft) above the ground. The top of the cloud has rounded towers. a. Cumulonimbus b. Cirrocumulus c. Cumulus

10. These are uniform grayish clouds that often cover the entire sky. They resemble fog that does not reach the ground. Usually no precipitation falls from these clouds, but sometimes they may drizzle. a. Cirrostratus b. Stratus c. Altostratus

CORRECT! :) Congratulations, you answered all 10 items correctly. Try again? End lesson?

Sources http://eo.ucar.edu/webweather/cloud3.html#Anchor-47857

Learning Object (Avellana & Eslao)

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Learning Object (Avellana & Eslao)