Weather Flashcards

1
Q

Humidity

A

the state or quality of being humid.

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2
Q

Cumulus Cloud

A

Cumulus clouds are clouds which have flat bases and are often described as “puffy”, “cotton-like” or “fluffy” in appearance. Their name derives from the Latin cumulo-, meaning heap or pile.

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3
Q

Stratus Cloud

A

Stratus clouds are low-level clouds characterized by horizontal layering with a uniform base, as opposed to convective or cumuliform clouds that are formed by rising thermals.

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4
Q

Cirrus Cloud

A

Cirrus is a genus of high cloud made of ice crystals. Cirrus clouds typically appear delicate and wispy with white strands. Cirrus are usually formed as warm, dry air rises, causing water vapor deposition onto rocky or metallic dust particles at high altitudes.

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5
Q

Cumulonimbus Cloud

A

Cumulonimbus is a dense, towering vertical cloud, forming from water vapor carried by powerful upward air currents. If observed during a storm, these clouds may be referred to as thunderheads. Cumulonimbus can form alone, in clusters, or along cold front squall lines

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6
Q

Condensation

A

water which collects as droplets on a cold surface when humid air is in contact with it.

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7
Q

Evaporation

A

the process of turning from liquid into vapor.

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8
Q

Precipitation

A

the action or process of precipitating a substance from a solution.

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9
Q

Runoff

A

the draining away of water (or substances carried in it) from the surface of an area of land, a building or structure, etc.

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10
Q

Rain

A

moisture condensed from the atmosphere that falls visibly in separate drops.

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11
Q

Sleet

A

a form of precipitation consisting of ice pellets, often mixed with rain or snow.

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12
Q

Snow

A

atmospheric water vapor frozen into ice crystals and falling in light white flakes or lying on the ground as a white layer.

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13
Q

Hail

A

pellets of frozen rain which fall in showers from cumulonimbus clouds.

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14
Q

Polar – Maritime Airmass

A

air coming originally from polar regions but having humidity and temperature properties modified by passing over relatively warm oceans.

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15
Q

Tropical – Maritime Airmass

A

air of a mass originating over tropical oceans and characterized by high temperature and humidity

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16
Q

Polar – Continental Airmass

A

This air mass often brings the rattleing cold, dry and clear weather on a perfect winter day and also dry and warm weather on a pleasant day in summer.

17
Q

Tropical – Continental Airmass

A

a type of tropical air produced by the subtropical ridge over large areas of land and typically originate from low-latitude deserts such as the Sahara Desert in northern Africa, which is the major source of these air masses.

18
Q

Cold Front

A

the boundary of an advancing mass of cold air, in particular the trailing edge of the warm sector of a low-pressure system.

19
Q

Warm Front

A

the boundary between a mass of warm air and a retreating mass of cold air

20
Q

Thunderstorm

A

a storm with thunder and lightning and typically also heavy rain or hail.

21
Q

Lightning

A

the occurrence of a natural electrical discharge of very short duration and high voltage between a cloud and the ground or within a cloud, accompanied by a bright flash and typically also thunder.

22
Q

Thunder

A

a loud rumbling or crashing noise heard after a lightning flash due to the expansion of rapidly heated air.

23
Q

Tornado

A

a mobile, destructive vortex of violently rotating winds having the appearance of a funnel-shaped cloud and advancing beneath a large storm system.

24
Q

Hurricane

A

a storm with a violent wind, in particular a tropical cyclone in the Caribbean.

25
Q

Thermometer

A

an instrument for measuring and indicating temperature, typically one consisting of a narrow, hermetically sealed glass tube marked with graduations and having at one end a bulb containing mercury or alcohol that expands and contracts in the tube with heating and cooling.

26
Q

Anemometer

A

an instrument for measuring the speed of the wind, or of any current of gas.