Density
What is density?
Density is the amount of mass per unit of volume. If an object is heavy and compact, it has a high density
What is air pressure?
A measure of the force of air pressing down on the Earth's surface.
What happens when you reach 100% humidity?
Condensation.
What is the effect of sugar on a person's energy level?
Independent- Sugar
Dependent- Energy level
Control- Normal behavior without sugar
A huge body of air that has similar temperature and humidity.
List the following objects from the least dense, to the most dense.
Baseball, marshmallow, tennis ball, and cotton ball.
What do you call the tool used to measure changes in air pressure? (Name both)
Mercury barometer and aneroid barometer.
Why is it important for people to know RELATIVE humidity which is calculated in percentages rather than the actual amount of water in the air?
Its important to know how much water the air can hold compared to how much it actually holds. For example if you say there is 235 grams of water in the air, you wouldn't know how that compares.
What kind of correlation do you typically observe when both variables are increasing?
Positive correlation.
What is a weather front?
The boundary where two different air masses meet.
As the density of air goes up, what happens to the air pressure?
Air pressure increases.
Is air pressure greater at sea level or above sea level?
Above sea level.
What is the equation to calculate relative humidity?
Amount of water vapor in the air / amount of water the air can hold x 100
How can you change a matter from one state to another?
By removing or adding energy.
If you were living Florida, which airmass would you be the most affected by?
Maritime tropical air mass.
Why does cold air sink?
Because it is more dense than warm air.
What are the 3 factors that may affect air pressure?
Temperature, elevation, and humidity.
What are 2 different ways that you can change relative humidity?
Change the amount of water vapor in the air or change the temperature.
What is the difference between humidity and relative humidity?
Humidity is the amount of water vapor in the air, and relative humidity is a comparison of how much water vapor air can hold vs. how much it is actually holding.
What kind of front forms when 2 different masses of air are pushing against each other but neither is powerful enough to move the other.
Stationary front.
Compare two objects: one is small but weighs 500 grams; the other is large but weighs 200 grams. Which is more dense.
The object that is 500 grams is more dense. Because it has more mass in a smaller volume its density is greater.
Does warm air typically have high or low pressure? Explain.
Warm air has lower pressure because warm air is less dense and therefore rises.
Would relative humidity be greater at colder or warmer temperatures? Explain.
Colder temperatures, because cold air can hold less water vapor.
Why do clouds form very high up in the atmosphere?
Warm air rises and since warm air can hold a lot of water vapor, once it rises high up in the atmosphere where the air is cooler, it begins to condense.
What kind of weather does a cold front usually bring?
Winds become gusty and there is a sudden drop in temperature. There may be heavy rain, sometimes with hail, thunder, and lightning.