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Science V.P. > Weather > Flashcards

Weather Flashcards

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0
Q

What instrument is used to track high and low pressure? What is it measured in?

A

Barometer-psi-pounds per square inch

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1
Q

What gases are in the atmosphere?

A

Nitrogen Oxygen Argon Carbon Dioxide and others such as Helium and Krypton

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2
Q

Explain why high pressure means clear skies

A 
The air is more dense
The air Falls
The air is compressed
compression is a warming process
The water evaporates
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3
Q

Why does a low pressure mean cloudy skies and maybe storms?

A 
The air is less dense
The air rises
The air expands
Expansion is a cooling process
The water molecules condensing form clouds
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4
Q

Why is the earth different from what it was 1 billion years ago?

A

Photosynthetic organisms caused a change

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5
Q

Why does a.m. radio transmit better at night then during the day?

A

When the sun goes down ions recombine and the reflection increases

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6
Q

What damages Ozone?

A

CFCs

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7
Q

What two types of air are separated by the jet stream?

A

Cold and warm

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8
Q

What type of process is compression?

A

Warming

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9
Q

What type of process is expansion?

A

Cooling

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10
Q

What are the three ingredients needed to make a cloud in a bottle?

A

Water vapor, expansion, and condensation nuclei

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11
Q

Why did the can crush?

A

The high-pressure on the outside of the can pushes the low pressure inside the can, causing implosion.

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12
Q

What is atmospheric pressure?

A

The weight of all the gas pushing down on us.

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13
Q

What creates wind?

A

When air moves from areas of high pressure to areas of low pressure.

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14
Q

What is relative humidity?

A

Relative humidity is the actual amount of water vapor in the air

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15
Q

What is humidity?

A

The maximum amount of water vapor the air could possibly hold

16
Q

As the temperature increases what can the air hold more of?

A

Water vapor

17
Q

What conditions have to be right for due to form?

A

The air has to be saturated and it has to be above 0°C

18
Q

What conditions have to be right for frost to form?

A

The air has to be saturated and it has to be below 0°C

19
Q

Why are clouds forming at almost all fronts?

A

The warm and cold air are coming together

20
Q

How do meteorologists measure the upper atmosphere?

A

It’s measured by a radiosonde, A package of weather instruments carried very high above the ground by a weather balloon

21
Q

What are the three types of pressures?

A

Barometric, atmospheric, and air

22
Q

What are isobars?

A

Lines of equal pressure

23
Q

What is pressured measured in

A

Millibars

24
Q

When Isobars are far apart where does this happen and what does it mean?

A

It happens at high pressures and it means that it’s calm

25
Q

When Isobars are close together where does this happen and what does it mean?

A

This happens out low pressures and it means that it’s windy

26
Q

What is an Air mass

A

Is a huge body of air with similar temperatures humidities and pressures

27
Q

What are the four types of fronts

A

Cold warm stationary occluded

28
Q

Why do stationary fronts have the same yucky weather for days on end

A

It doesn’t move

29
Q

A visible map so sings that can be seen in what?

A

Daylight

30
Q

What does an infrared maps detect

A

Heat

31
Q

On an infrared map what is black?

A

The ground

32
Q

On an infrared map what is white

A

Clouds

33
Q

What type of cloud is Hail formed in

A

Cumulonimbus

34
Q

What ingredients are needed for hail in a test tube

A

Supercooled water ice crystals/Seed of ice

35
Q

What are doldrums?

A

There is a low pressure and little wind and the rising air then cools causing rain

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