Science Test-3/2/18 Flashcards Preview

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Flashcards in Science Test-3/2/18 Deck (23)
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1
Q

What is in the air beside gases?

A

Particles and Water Vapor

2
Q

How does air pressure change as you go up in elevation?

A

As you go up the air pressure gets lower because there is less atmosphere pushing down on you and it is less dense.

3
Q

When do clouds form?

A

Clouds form when air is cooled to its dew point and particles are present.

4
Q

When air masses meet at a front, what often occurs?

A

The collision often causes storms and changeable weather.

5
Q

What was demonstrated when a balloon was put on the balance, both before and after the balloon was inflated?

A

That air has mass?

6
Q

What tool is used to measure air pressure, and what units are used to measure air pressure in?

A

A barometer and “inches of Mercury” or millibars

7
Q

When air density increases, how does that change the air pressure?

A

When air density increases so does the air pressure.

8
Q

What type of heat transfer is most responsible for spreading heat through the atmosphere?

A

Convection

9
Q

How do convection currents spread through the atmosphere?

A

The warm air rises and the cold air sinks. This repeats.

10
Q

What happens to molecules when their temperature is increased?

A

They move around more.

11
Q

How is the beaker of water (tea) on the hot plate similar to the air in our atmosphere?

A

Heated from the bottom.

12
Q

During a cold front, where does precipitation occur?

A

At the boundary where the cool air mass and warm air mass meet but don’t mix.

13
Q

What type of air mass forms over the Gulf of Mexico (near Florida) and what are its characteristics?

A

Maritime Tropical: warm and humid

14
Q

What type of air mass forms over Canada, and what are its characteristics?

A

Continental Polar: clear, cold and dry

15
Q

What type of weather occurs during a cold front, and after the front passed?

A

During: quick weather changes, thunderstorms
After: skies are clear, cooler

16
Q

What type of weather occurs during a warm front, and after the front passes?

A

During: slow steady rain
After: warm and humid

17
Q

How does wind move relative to areas of different air pressure?

A

Wind moves from high to low pressure.

18
Q

During a sea breeze why does wind move toward the land?

A

Because the warm air is rising over the land so the cool air from the sea moss toward the land to take its place.

19
Q

Why does a sea breeze usually happen during the day?

A

Because the ocean is cooler than the land during the day.

20
Q

What makes the Coriolis Effect and how does it affect the wind?

A

The Earth’s rotation.

Winds deflect to the right in the Northern Hemisphere.

21
Q

How is precipitation related to relative humidity?

A

Precipitation occurs when relative humidity reaches 100%.

22
Q

If 2 air masses contain the same amount of water vapor, what other factor would determine which one has the greater relative humidity?

A

Temperature because warm air can hold more water vapor than cold air.

23
Q

If you had been given a larger sponge during the relative humidity lab, how would that be similar to increasing the temperature of an air mass?

A

A larger sponge can hold more water just like a warmer air mass can hold more water vapor.