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Worksheets7th Grade Semester Review
Total questions: 20
Worksheet time: 40mins
Select the best definition for "Air" according to science
A current of wind, a force.
A mixture "bouncing" molecules, such as Oxygen, Carbon Dioxide and Nitrogen.
Air is made of only one molecule, also called "Air Molecules"
Select the best definition of "Temperature", according to Science
How fast the molecules are moving
How hot or cold something is
How bad something burns when I touch it
How strong something is
If you go up in altitude (climb the mountain), what happens to the density of the molecules in the air?
Goes up
Goes down
Stays the same
If you go up in altitude (climb the mountain), what happens to the air pressure? (Also called atmospheric pressure or barometric pressure)
Goes up
Goes down
Stays the same
What happens to the oxygen molecules as altitude increases?
Fewer molecules (Less density)
More molecules (Greater density)
Same amount of molecules
Nacho Molecules
When you heat air molecules up, consequently density goes ___
Down
Up
When you cool down air molecules, air density goes ____
Down
UP
Sometimes when traveling in an airplane your ears may pop, why?
your eardrum busted
as the airplane goes up it gets colder.
the humidity decreased
the change in altitude effected air pressure
Why is it harder to breathe at higher altitudes?
Higher pressure
Mountains are scary
Lower density of oxygen molecules in the air
Which type of weather system brings cold, dry air?
High Pressure System
Low Pressure System
Which type of weather system brings warm, moist air?
Low Pressure System
High Pressure System
