Weather Quiz Flashcards

1
Q

Water cycle (definition)

A

The movement of water through Earth’s systems, powered by the sun’s energy

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2
Q

humidity

A

a measure of the amount of water vapor in the air

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3
Q

relative humidity

A

the percentage of water vapor that is actually in the air compared to the maximum amount of water vapor the air can hold at a particular temperature

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4
Q

psychrometer

A

An instrument used to measure relative humidity

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5
Q

How does a psychrometer work?

A

It has a wet-bulb and a dry-bulb thermometer, the wet-bulb is covered by a moist cloth, when the psychrometer is slung air blows over both thermometers, the relative humidity can be found by comparing the temperatures of the wet-bulb and dry-bulb thermometers

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6
Q

dew point

A

the temperature at which condensation begins

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7
Q

cirrus clouds

A

wispy, and feathery clouds at high altitudes

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8
Q

altocumulus and altostratus

A

medium level clouds that indicate precipitation

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9
Q

cumulus clouds

A

low level clouds that look like cotton that indicate thunderstorms

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10
Q

fog

A

clouds that form near the ground

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11
Q

cirrocumulus clouds

A

mid level clouds that indicate storms and look like cotton

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12
Q

stratus

A

dull flat layer clouds that look gray

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13
Q

nimbus clouds

A

clouds that produce precipitation

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14
Q

precipitation definition

A

any form of water that falls from clouds and reaches Earth’s surface

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15
Q

What are the 5 types of precipitation?

A

sleet, hail, snow, freezing rain, rain

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16
Q

What is sleet?

A

Ice particles smaller than 5 millimeters in diameter

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17
Q

What is hail?

A

a round pellet of ice larger then 5 millimeters in diameter

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18
Q

What is snow?

A

water vapor in a cloud that is converted directly into ice crystals

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19
Q

What is freezing rain?

A

rain drops that fall as liquid, but freeze when they touch a cold surface

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20
Q

What is rain (definition)?

A

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

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21
Q

What is a rain gauge?

A

An open ended tube that collects rain

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22
Q

What is a flood?

A

An overflowing of water normally in a dry area

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23
Q

What is a drought?

A

A long period of scarce rain or dry weather

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24
Q

What is an air mass?

A

a huge body of air in the lower atmosphere that has similar temperature, humidity, and air pressure at any given height

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25
What are the four types of air masses?
Tropical, Polar, Maritime, and Continental
26
What is a Tropical air mass?
an air mass that forms in the tropics and have low air pressure
27
What is a Polar air mass?
an air mass that forms at 50 degrees North latitude and 50 degrees South latitude, polar air masses have high air pressure
28
What is a Maritime air mass?
An air mass that forms over oceans, so the air can become very hungry
29
What is a continental air mass?
An air mass that forms over land, these air masses have less exposure to large amounts of moisture from bodies of water, therefore continental air masses are dryer then maritimes
30
What are prevailing westerly winds?
The major wind belts over the continental United States, these generally push in masses from east to west
31
What are jet streams?
bands of high speed winds going from West to | East about 10km above Earth's surface
32
What are trade winds?
a wind blowing steadily toward the equator from northeast or southeast, especially at sea.
33
What is a front?
the boundary where air masses meet
34
What are the types of fronts?
cold, warm, occluded and stationary
35
What is a Continental Polar air mass?
cold and dry air mass
36
What is a Maritime Polar air mass?
A cold, wet, low humidity air mass that causes Nor'easters
37
What is a continental tropical air mass?
Warm, dry and hot air masses
38
What is a maritime tropical air mass?
warm, wet and humid air mass that can bring thunderstorms
39
What are cold fronts?
When the warm air is pushed upward along the leading edge of the colder air
40
What are warm fronts?
a fast moving warm air overtakes the slow moving cold air and also is accompanied by clouds and precipitation
41
What are Occluded fronts?
Where a warm front is caught between two cooler fronts, and the warm air is cut off from the ground
42
What are stationary fronts?
When cold air masses and warm air masses meet, but neither can move, so therefore it is called a stationary front
43
What is a cyclone?
A swirling center of low air pressure
44
What is an anticyclone?
High pressure centers of dry air shown by an H on a weather map
45
Cyclone vs. Anticyclone
cyclone is low air pressure and anticyclone is high air pressure
46
What is a storm?
A violent disturbance in the atmosphere
47
What is a thunderstorm?
a small storm often accompanied by heavy precipitation and frequent thunder and lightning
48
What is lightning?
A sudden spark or electrical discharge
49
What is a hurricane?
a tropical cyclone with winds of 119km/h or higher
50
What is a storm surge?
A 'dome' of water that sweeps across the coast where the hurricane lands
51
What is a tornado?
A rapidly whirling funnel-shaped cloud that reaches down from a thunderstorm to touch Earth's surface
52
What is a meteorologist?
A scientist that tries to predict that weather
53
How do you be safe in a winter storm?
If you are caught in a snowstorm or winter storm, try to find shelter from the wind
54
How do you be safe from a thunderstorm?
During a thunderstorm avoid places where lightning may strike. Also avoid objects that can conduct electricity, such as metal objects and bodies of water
55
How do you be safe from a hurricane?
You should be prepared to evacuate or move away temporarily, if you hear a hurricane warning and are told to evacuate, leave immediatley
56
How do you be safe from a tornado?
The safest place to be during a tornado is in a storm shelter or basement
57
How does a hurricane form step 1?
1. equatorial sun strag
58
How does a hurricane die?
Land, cold water, Cold front- continental polar, dropping down from an anticyclone, cold air/windsheer
59
How does a hurricane form step 2?
2. Massive evaporation takes place
60
How does a hurricane form step 3?
3. Convection causes t-storms
61
How does a hurricane form step 4?
4. T-storms organize in squall line
62
How does a hurricane form step 5?
5. squall line is pushed outside by weather force (upper level disturbance) which causes kink
63
How does a hurricane form step 6?
6. Hurricane grows from spinning squall line. Inner convection gets stronger, cow pressure strengthens, eye wall forms