Science- Air Presure

As air pressure decreases, so does air density. true/false

true

Because air has mass, it has density and pressure. true*false

true

If volume stays the same, density increases as mass increases and decreases when mass decreases. false?

true

The more molecules in a given volume of air, the greater its density. true;false

true

true or false? Air has mass because it is composed of atoms and molecules.

true

9. Another word for elevation, or distance above sea level is... ( think of a plane)

altitude

has no liquid - the airtight metal chamber bulges (from air) when air pressure increases.

aneroid barometer

mass

A measure of the amount of matter in an object

If the air pressure is 30 inches, what does it equal to in millibars

1,016

pressure

Defined as the force of an object divided by the area on which it act

density

Density=mass/volume

below the mercury line

The line should be (of the barometer....)

4. An instrument used to measure air pressure

barometer

The amount of oxygen in each breath is less at high altitudes. what is it talking about?

breathing at higher altitudes

isoline

every point on the line that has the same value

Air pressure does NOT increase as altitude increases, air pressure DECREASES as altitude increases. true-false

false

As altitude increases, so does air density. As altitude increases, air density DECREASES. true false

false

true. false As altitude increases, so does air density. As altitude increases, air density DECREASES.

false

pressure is ___ at sea level because at sea level there is ____atmosphere pressing down

greater, more pressure is ___ at sea level because at sea level there is ____atmosphere pressing down

Because air has mass, it also has...

has density and pressure

At ___ elevations, air is ___ dense and has ___oxygen.

higher, less, less

Two different units used to measure air pressure are...

inches of mercury and millibars

mass stays the same, density _____ when volume decreases and it _____when volume _____.

increases, decreases, increases

isotherm

lines of constant or equal temperature

isobar

lines of constant pressure on a weather map

contains liquid mercury - the mercury is forced up a column when air pressure increases.

mercury barometer

weight of the atmosphere itself is constantly...

pressing on your body.

air pressure

the force exerted by air, whether compressed or unconfined, on any surface in contact with it.