The Atmosphere
Which gas, nitrogen or oxygen is in the higher percentage?
Nitrogen
Which gas variable represents the number of molecules of gas in a container?
moles
What is standard pressure in atmospheres?
one atmosphere
In what state of matter are the molecules very far apart?
the gaseous state
In what type of relationship does x increase while y decreases?
indirect relationship
What is the percentage of oxygen in the atmosphere?
twenty-one percent
Which gas variable represents the amount of space a gas takes up?
volume
What is standard pressure in millimeters of mercury?
760 mm Hg
Which is the only state of matter that is compressable?
the gaseous state
What are the 4 gas variables?
volume
temperature
pressure
number of moles
What gas in the atmosphere is a green gas that keeps Earth warm?
carbon dioxide
Which gas variable is a result of a gas molecules colliding with the walls of their container?
pressure
Name the instrument that measures atmospheric pressure.
barometer
According to the kinetic molecular theory, gases are constantly doing this.
moving
or
colliding with the walls of their container
What is the name of the variable in an experiment that you change?
the independent variable
How does air pressure change with increasing altitude?
Air pressure decreases.
Which gas has a higher temperature, the one with..
A. slow moving molecules?
B. the one with fast moving molecules?
B. Fast moving molecules.
When a gas is in a sealed container, what causes gas pressure?
the molecules colliding with the sides of the container.
What happens to the pressure of a gas when you make its volume smaller but keep the temperature and number of moles the same?
The pressure increases.
What term refers to variables that do not change during an experiment?
constants
When you drink from a straw, what actually causes the drink to rise up in the straw?
The air pressure pushing down on the liquid in the glass.
DOUBLE JEOPARDY!
When you blow up a balloon or add air to your tires, which gas variable are you specifically changing? Not which ones change as a result of adding air.
When you fly in an airplane, is the pressure inside the plane
A. a greater than the air pressure outside the plane?
B. less than the air pressure outside the plane?
A. Greater than the pressure outside the plane.
When gas molecules heat up, what happens to the speed of the molecules?
They speed up.
On what axis does the dependent variable go?
on the y axis