Air Pressure

Question 0

Altitude

Answer 0

The distance about sea level

Question 1

Air pressure

Answer 1

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

Question 2

Android barometer

Answer 2

Instrument that measures changes in the air pressure without using liquid it also has an airtight metal chamber

Question 3

Barometer

Answer 3

Any instrument that measures changes in the air pressure

Question 4

Density

Answer 4

The amount of mass in a unit volume of a substance

Question 5

Mercury barometer

Answer 5

Instrument that measures changes in the air pressure using a liquid

Question 6

Pressure

Answer 6

Force per unit area

Question 7

What are the 3 main Things that air has

Answer 7

Mass and density and pressure

Question 8

Denser air exerts ____ ___ _______ than less ____ ___

Answer 8

More air pressure-dense air

Question 9

Why are we not crushed by the airs pressure

Answer 9

Molecules are pushing in all different directions at all times.

Question 10

When does mercury in a mercury barometer rise

Answer 10

When the air pressure pushes down on the surface of the mercury in the dish

Question 11

What happens to an android barometer when air pressure increases

Answer 11

The thin walls are pushed

Question 12

What happens to an android barometer when the pressure drops

Answer 12

The walls bulge out

Question 13

Why are aneroid barometers more practical than mercury barometer’s

Answer 13

They are smaller and don’t contain a liquid

Question 14

What are two common units used to measure air pressure

Answer 14

Inches and millibars

Question 15

What happens as you go higher

Answer 15

Air pressure decreases from around 1000 millibars at sea level to about 500 at around 18,000 feet

Question 16

What happens at about 100,000 feet above sea level

Answer 16

The air pressure is only about 10 millibars

Question 17

As air pressure decreases…

Answer 17

So does density

Question 18

How does altitude affect density

Answer 18

Since the air is less dense at a higher altitude,there are fewer 02molecules to breeze you’re taking in less O2 with each breath this is why you get out of breath easily

Question 19

Why does air have mass

Answer 19

It is composed with Adams in molecules which has mass

Question 20

Why is it hard to breathe at the top of the Mountain

Answer 20

There is low-pressure and density there are fewer oxygen molecules only 21% of air

Question 21

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

Answer 21

Greater

Question 22

How does increase in the density of gas affect its pressure

Answer 22

Increasing the density of the gas, increases its pressure

Question 23

If the air pressure is 30 inches, how many millibars of air pressure there

Answer 23

1016

Question 24

Why is air pressure greater at sea level than the top of the mountain

Answer 24

Sea level air has the weight of the whole atmosphere pressing on it

Question 25

Does falling air pressure usually indicate that a storm is approaching

Answer 25

Yes

Question 26

What were the first barometers invented

Answer 26

Aneroid barometer’s