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.