Weather Flashcards

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

24
When Isobars are far apart where does this happen and what does it mean?
It happens at high pressures and it means that it's calm
25
When Isobars are close together where does this happen and what does it mean?
This happens out low pressures and it means that it's windy
26
What is an Air mass
Is a huge body of air with similar temperatures humidities and pressures
27
What are the four types of fronts
Cold warm stationary occluded
28
Why do stationary fronts have the same yucky weather for days on end
It doesn't move
29
A visible map so sings that can be seen in what?
Daylight
30
What does an infrared maps detect
Heat
31
On an infrared map what is black?
The ground
32
On an infrared map what is white
Clouds
33
What type of cloud is Hail formed in
Cumulonimbus
34
What ingredients are needed for hail in a test tube
Supercooled water ice crystals/Seed of ice
35
What are doldrums?
There is a low pressure and little wind and the rising air then cools causing rain