Air Density

Warm air is __________ dense than cold air and rises creating convection currents.

• more

• less

Tags

NGSS.MS-ESS2-5

NGSS.MS-ESS2-6

Heat transfer by convection is caused by differences in what two things:

• Thickness and material

• Weight and electricity

• Temperature and density

Tags

NGSS.MS-PS1-4

Why is it hard to breath at high altitudes?

• There is too much oxygen in this location.

• There is a higher density of air molecules.

• There is a low density of air molecules.

• The air pressure is greater than at low altitudes.

Areas of high temperatures usually have...

• High air pressure.

• Low air pressure.

• Average air pressure.

• Fast moving winds.

Tags

NGSS.MS-ESS2-5

NGSS.MS-ESS2-6

Why did the balloon come back down to the ground?

• The air around it pushed it down.

• The air inside cooled and became more dense forcing the balloon to descend. 

• The air inside the balloon heated up and the air was too hot to rise. 

• The balloon may have had a hole in it.

Tags

NGSS.MS-PS2-2

Warm air is _____ dense than cool air.

• more

• less

• the same

Tags

NGSS.MS-ESS2-5

NGSS.MS-ESS2-6

What is the formula for density?

• density = mass x volume

• density = mass / volume

• density = mass + volume

• density = mass - volume

What happens to air density as altitude increases?

• It increases

• It decreases

• It remains constant

• It fluctuates unpredictably

Which of the following factors primarily affects air density?

• Humidity

• Temperature

• Wind speed

• Cloud cover

How does temperature affect air density?

• Higher temperature increases air density

• Higher temperature decreases air density

• Temperature has no effect on air density

• Temperature and air density are inversely proportional

Tags

NGSS.MS-PS1-4