2-4 Clouds Flashcards

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1
Q

A measure of the amount of water vapor in the air

A

Humidity

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2
Q

The percentage of water vapor in the air compared to the maximum amount the air could hold

A

Relative humidity

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3
Q

A has two thermometers, a wet- bulb and a dry-build thermometer. The wet bulb thermometer has a cloth that is moistened with water. Air is then blown over both thermometers. Because the wetbulb thermometer is cooled by evaporation, it’s readings drop below that of the dry thermometer. If the relative humidity is high, the water on the wet bulb will evaporate slowly and the well bold temperature will not change much. If the relative humidity is low, the water on the wet bulb will evaporate rapidly in the wetbulb temperature will drop. The relative humidity can be found by comparing the temperatures of the wetbulb and dry bulb thermometers on a table

A

Psychrometer

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4
Q

The process by which molecules of water in the air become liquid water

A

Condensation

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5
Q

The temperature at which condensation begins

A

Dewpoint

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6
Q

Water that condenses from the air onto a cold surface

A

Dew

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7
Q

Clouds that look like fluffy round in piles of cotton. These clouds form less than 2 km above the ground but may grow in size and high until they expand upward as much as 18 km. Usually a sign of fair weather

A

Cumulus clouds

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8
Q

Towering clouds with flat tops that often produce thunderstorms

A

Cumulonimbus clouds

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9
Q

Clouds that form in flat layers, spread out, and cover most of the sky are called

A

Stratus clouds

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10
Q

Wispy, feathery clouds that form only at high levels (above about six km) where temperatures are low, made mostly of ice crystals

A

Cirrus clouds

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11
Q

Clouds that look like rows of cotton balls that often indicate that a storm is on its way

A

Cirrocumulus clouds

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12
Q

The two main types of clouds with the prefix -alto

A

Altostratus and altocumulus clouds

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13
Q

Clouds that form at or near the ground, often forms when ground cools at night after a warm humid day. The ground cools the air just above the ground to the air’s dew point.

A

Fog

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14
Q

As stratus clouds begin to thicken they may produce rain or snow, the they are called

A

Nimbostratus clouds

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15
Q

The process by which water molecules in liquid water escape into the air as cater vapor

A

Evaporation

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