1-3 Air Pressure Flashcards

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0
Q

Why is the air at the top of a mountain hard to breathe

A

There are less oxygen molecules

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1
Q

Why does air have mass

A

The atoms and molecules in the air have mass

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2
Q

The force pushing on an area or surface is known as

A

Pressure

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3
Q

The amount of mass in a given volume of air is it’s

A

density

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4
Q

To coming unit used to measure air pressure

A

Inches and millibars

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5
Q

What is altitude

A

Altitude is the elevation above sea level

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6
Q

Which barometer has a glass tube open at the bottom end and partially filled with mercury

A

Mercury barometer

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7
Q

Why doesn’t air pressure crush us

A

Air molecules push it in all directions

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8
Q

What is an aneroid barometer

A

A barometer that is not filled with liquid and is portable

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9
Q

The result of the weight of a column of air pushing down on an area is called

A

Air pressure

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10
Q

There are more molecules in a given volume of air, the density is

A

Greater

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11
Q

What instruments are used to measure air pressure

A

Barometers

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12
Q

How does increasing the density of a gas affect its pressure

A

Increasing the density of a gas increases its pressure

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13
Q

Which barometer does not contain a liquid

A

Aneroid barometer

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14
Q

The weight the of air in the atmosphere causes

A

Air pressure

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15
Q

Air pressure As altitude

A
  1. Decreases

2. Increases

16
Q

As air pressure So does Density

A
  1. Decreases

2. Density