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Day Skipper Course > Meteorology > Flashcards

Meteorology Flashcards

1
Q

What is Meteorology?

A

Study of Weather

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2
Q

What happens to air when you heat it?

A

It becomes less dense and rises

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3
Q

What happens to air when it is cooled?

A

It becomes denser and falls

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4
Q

True or False?

Moist air is more buoyant than dry air

A

True

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5
Q

What happens in the water cycle?

A

Evaporation
Condensation
Precipitation

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6
Q

Name four types of clouds?

A

Cirrus
Stratus
Cumulus
Nimbus

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7
Q

True or False?

The darker and thicker looking the clouds the worse the weather is likely to be

A

True

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8
Q

What are the two types of Weather Systems?

A

High Pressure and Low Pressure

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9
Q

What are the two units of measurements used?

A

Millibars (mb) and HectoPascals (hPa)

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10
Q

What is a barometer used to measure?

A

Air pressure

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11
Q

What kind of weather would you expect to find in the Northern Hemisphere with high air pressure?

A 
Light winds that rotate clockwise
Surface wind blows outwards
No rain
Clear skies
Stability
Pleasant Weather
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12
Q

What kind of weather would you expect to find in the Northern Hemisphere with low air pressure?

A 
Strong, gusty wind that rotates anti-clockwise 
Surface wind blows inwards 
Rain
Cloud
Instability 
Unpleasant weather
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13
Q

True or False?

General direction of movement is from East to West

A

False - general direction of movement is from west to East, not always though

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14
Q

What are the charts that show the weather called?

A

Synoptic charts

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15
Q

What does it mean if isobars are really close together?

A

Strong wind

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16
Q

How can you identify cold fronts on the chart?

A

Blue spikes

17
Q

How can you identify warm fronts on the chart?

A

Red semi-circles

18
Q

What are the three types of barometer?

A

Original liquid barometer
Aneroid barometer
Electronic barometer

19
Q

What is a front?

A

Where warm and cool masses meet

20
Q

What is a depression?

A

An area of low pressure

21
Q

How do you convert wind speed of knots to the Beaufort Wind Scale?

A

Add 5 then divide by 5

22
Q

What does imminent gale warning mean?

A

Within 6 hours from forecast time

23
Q

What is poor visibility?

A

1000m - 2M

24
Q

What are some sources of Weather Forecasts?

A 
Internet
Coastguard VHF
Public Radio and TV
GSM Telephone
Met Office
Navtex
HF and MF Radio
Barometer
25
Q

What is a Dew Point?

A

The temperature to which air must be cooled for water to turn from water vapour into liquid water

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