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Geography > Weather > Flashcards

Weather Flashcards

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1
Q

Oblique Ray’s

A

The sun is at a low angle and the Rays must cover a larger area of land due to the earths curve so it takes longer to heat up

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2
Q

Vertical Ray’s

A

Close to the equator. That have less ground to cover so it heats up rapidly and causes it to get very hot

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3
Q

Low atmospheric pressure

A

When air is heated it expands and becomes lighter. It rises and creates low atmospheric Pressure

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4
Q

High atmospheric pressure

A

When air is cooled it becomes heavier and it presses down on the earths surface and creates high atmospheric pressure

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5
Q

Wind facts

A

Winds are named from the direction in which they blow.

Winds most common in an area are the prevailing winds

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6
Q

Coriolis effect

A

As the earth spins on its axis the wind direction changes. Winds are directed to the right of their direction in the northern hemisphere. And to the left of their direction in the Southern Hemisphere

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7
Q

Doldrums

A

Areas close to the equator where winds speeds have slowed down or died down entirely

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8
Q

Movement of ocean currents

A

Unequal heating of the currents.

The prevailing winds
The rotation of the earth

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9
Q

North Atlantic drift

A

Flows north easterly from the Gulf of Mexico

Brings mild winters and rainfall

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10
Q

Canaries currents

A

Flows southerly direction off west Africa

Winds loose moisture and cause little rainfall

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11
Q

Labrador current

A

Flows south from the Arctic Ocean.
Mingles with gulf steam and produces fog
Lowers temperature of ocean

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12
Q

Air mass

A

Large bodies of air that have similar temperature, moisture and pressure

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13
Q

Maritime air mass

A

Bring rain

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14
Q

Continental air mass

A

Dry

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15
Q

Polar

A

Cold

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16
Q

Tropical

A

Warm

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17
Q

Cold front

A

Pushes in and replaces warm air.

Warm air is forced to rise it cools and condenses and causes heavy rain

18
Q

Warm front

A

Warm air approaches cold air. The cold air is to heavy to rise so the warm air rises on top of the cold air

Cold condenses=dark clouds and heavy rain

19
Q

Occluded front

A

Cold front overtakes a warm front cause all the warm air to rise leaving no warm air at ground level

20
Q

Isobar

A

Areas on a map of equal pressure

21
Q

Isotherms

A

Areas on a map of equal temperature

22
Q

Isohels

A

Areas on a map of equal sunshine

23
Q

Isohyets

A

Areas on a map of equal rainfall

24
Q

Depression

A

Windy and unsettled weather cloudy conditions periods of rain and in winter snow

25
Q

Anticyclone

A

Cloudless skies and days cold and nights even colder in the winter and in the summer it is warm and dry and light winds

26
Q

Cirrus

A

Wispy, occur at high altitude and fare weather

27
Q

Cumulus

A

Fluffy and woolly, occur at medium altitude. bring rain if dark

28
Q

Stratus

A

Occur at low altitude, bring drizzle light rain and come in thin layers

29
Q

Relief rainfall

A

Worm moist air blows in from over sea.
It meets a coastal mountain range and is forced to rise

Air cools and condenses and clouds form and rain falls on the windward side of the mountain
On the leeward side a rain shadow is created because of very little moisture

30
Q

Cyclonic rainfall

A

Cold polar air and moist tropical air masses meet at a front
The warm air mass rises over the cold Thai causes warm air to cool and condensation occurs
Clouds form and rain falls
Rain becomes heavier

31
Q

Conventional rainfall

A

Earths surface is heated by solar energy
The land warms the air and moisture is evaporated
The warm moist air rises and cools and condenses and clouds form
Heavy showers occur

32
Q

Weather

A

Word used to describe the state of the atmosphere at any particular time and place. Weather can change everyday

33
Q

Meteorologists

A

Study, analyse and record the weather and then present it on the weather forecast

34
Q

Measuring temperature

A

Thermometer
Degrees Celsius
Isotherms

35
Q

Mean temperature range

A

Sum of monthly temperature divided by 2

36
Q

Temperature range

A

Max temperature - min temperature

37
Q

Atmospheric pressure

A

Barometer
Isobars
Measured in milibars and hectopascals

38
Q

Humidity

A

Wet and dry bulb thermometers

Percentage

Amount of moisture in the air

39
Q

Wind speed and direction

A

Anemometer - wind speed
Weather vane- direction
Beaufort scale- wind strength

40
Q

Precipitation

A

Rain gauge

Multimeter

41
Q

Sunshine

A

Hours per day

Campbell stokes sunshine recorder

Geography (3 decks)

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