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Test 1 Flashcards

1
Q

Which international organization overseas the unification of meteorological information and observations?

A

World meteorological organization

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2
Q

What is the title of the National organization that oversees the unification of meteorological information and observations?

A

National oceanic and atmospheric administration

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3
Q

What is the freezing point of water in Fahrenheit?

A

32°

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4
Q

What is the boiling point of water in Fahrenheit?

A

212°

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5
Q

What is the boiling point of water in Celsius?

A

100°

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6
Q

A millibar is a unit of

A

Pressure

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7
Q

What are the layers of the earths atmosphere starting from the earth surface?

A

Troposphere, stratosphere, mesosphere, thermosphere

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8
Q

What layer of the atmosphere contains the majority of weather phenomenon impacting Mariners?

A

Troposphere

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9
Q

Which heavenly body greatly impacts the weather on earth?

A

The

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10
Q

What is the percentage of oxygen in the air under normal conditions?

A

21%

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11
Q

Under normal conditions what gas represents the majority of the earths atmosphere?

A

Nitrogen

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12
Q

Heat can spread by which means?

A

Convection, Conduction, radiation

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13
Q

Ascending and descending air masses with different temperatures as part of an important heat transmitting process in our atmosphere called

A

Convection

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14
Q

The speed of sound is

A

1125.33 ft./s

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15
Q

The appearance of nimbostratus clouds in the immediate vicinity of a ship at sea would be accompanied by what condition?

A

Rain and poor visibility

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16
Q

Uniform, grayish white cloud sheets that cover large portions of the sky, and are responsible for a large percentage of the precipitation in the temperate latitudes are called

A

Altostratus

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17
Q

Mackerel sky fair weather clouds

A

Cirrocumulus

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18
Q

Thin white clouds known as mares tails

A

Cirrus

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19
Q

The bases of middle clouds are located at altitudes between

A

6500 to 18000

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20
Q

Which list of clouds in sequence from highest to lowest in the sky

A

Cirrostratus altostratus stratus

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21
Q

Which cloud types give good indication of approaching weather?

A

Cirrostratus, cirrus, alto stratus (if accompanied by falling barometer), cumulus when large and unstable, nimbostratus

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22
Q

Clouds are classified according to their

A

Altitude and how they were formed

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23
Q

Rain that doesn’t make it to the ground is known as

A

Virga

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24
Q

What type of clouds gives the appearance of a halo around the sun or moon?

A

Cirrostratus

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25
Q

Cirrus

A

Thread

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26
Q

Cumulus

A

Heap

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27
Q

Stratus

A

Layer

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28
Q

Nimbus

A

Gray rain cloud

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29
Q

Fractus

A

Broken

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30
Q

Name the 10 principal cloud types

A 
Stratus ST
Nimbostratus NS
Stratocumulus SC
Cumulus Cu
Cumulonimbus Cb
Altocumulus Ac
Altostratus As
Cirrus Ci
Cirrocumulus Cc
Cirrostratus Cs
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31
Q

Relative humidity is the percentage of water vapor that is in the air as compared to the maximum amount it can hold at

A

A specific temperature

32
Q

When unsaturated air is forced to rise through the environment it cools at a constant rate of

A

1°C per 100 m or 5.4°F per 1000 feet

33
Q

Cloud formations are minimal when the

A

Surface temperature and temperature a loft or equal

34
Q

The dewpoint is reached when the

A

Air becomes saturated with water vapor

35
Q

The dewpoint temperature is

A

The temperature at which the air is saturated with water vapor

36
Q

The temperature to which unsaturated air must be cooled to become saturated is the

37
Q

As the temperature for a given mass of air increases the

A

Dewpoint decreases

38
Q

Which conditions are necessary for the formation of dew?

A

Clear skies, calm air, earth surface cooler than the dewpoint of the air

39
Q

The region containing 3/4 of the mass of the atmosphere in the region to which Are confined such phenomenon as clouds storms participation and changing weather conditions is called the

A

Troposphere

40
Q

On a working copy of a weather map, a stationary front is represented by which color line?

A

Alternating red and blue

41
Q

The earths a regular heating is caused by

A

The time of day the season and geography

42
Q

Atmospheric pressure at sea level is equal to

A

29.92 inches of mercury

43
Q

And occluded front on a weather map is colored

44
Q

Alto cumulus clouds are defined as

A

Middle clouds

45
Q

Which type of weather can you expect soon after seeing hook or comma shaped cirrus clouds?

A

The formation of a tropical depression

46
Q

The expression the air is saturated means

A

The relative humidity is 100%

47
Q

Freezing salt water spray should be anticipated when the air temperature drops below what temperature?

48
Q

Which type of precipitation is a product of a violent convection found in thunderstorms?

49
Q

Clouds form

A

as a mass of warm humid air rises into the atmosphere and cools, condensing moisture into small droplets

50
Q

The low dark sheet like cloud which is associated with continuous precipitation for many hours is a

A

Nimbostratus

51
Q

In a weather report the term visibility expresses

A

How far you can see with the naked eye

52
Q

Ascending and descending air masses of different temperatures as part of an important heat transmitting process in our atmosphere called

A

Convection

53
Q

Good weather is usually associated with a region of

A

High barometric pressure

54
Q

What occurs when rising air cools to the dewpoint?

A

Clouds form

55
Q

What is a common unit of measure for atmospheric pressure?

56
Q

Fog forms when the air is

A

90% saturated with water

57
Q

What does water tend to do when cooled?

58
Q

Air circulation is caused or affected by

A

The rotation of the earth on the axis

59
Q

When a warm air mass is adjacent to a cold air mass the separation line between the two is called a

60
Q

When cold air displaces warm air you have a

A

Cold front

61
Q

The fog most commonly encountered at sea is called

A

Advection fog

62
Q

Radiation fog

A

Dissipates during the evening

63
Q

The fog produced by warm moist air passing over a cold surface is called

A

Radiation fog

64
Q

The type of fog that occurs on clear nights with a very light breezes and forms when the earth calls rapidly by radiation is known

A

Radiation fog

65
Q

The weather front exists when

A

Air masses of different temperatures meet

66
Q

Which of the symbols shown represents a warm front?

A

A red line with red semi circles on top

67
Q

Advection fog is most commonly caused by

A

Warm moist air being blown over a cold or surface

68
Q

Fog is likely to occur when there is little difference between the dewpoint and the

A

Air temperature

69
Q

Fog generally a clears when

A

Wind speed increases wind direction changes and temperature increases

70
Q

On a weather map a cold front is represented by what color

71
Q

And a copy of the weather map is stationary front is represented by which color line?

A

Alternating red and blue

72
Q

Which type of rain is associated with airstream being forced to rise the Heights well above the condensation level?

A

Orographic rain

73
Q

In orographic rain, the arid side of the range of hills or mountains found on the Windward side

74
Q

Which category of frozen water is identified with black ice?

A

Glaze frost

75
Q

Which of the following condition causes reduced visibility due to smoke dust or sand being in the

Meteorology (3 decks)

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