WONDER #1866: Can You See the Wind?
Question 1 of 3
Air is invisible in large part because it is a what?
Question 2 of 3
Gas molecules are what compared to the average wavelength of visible light?
Question 3 of 3
At sea level, the average weight of the air above you is approximately how many pounds per square inch?
Check your answers online at https://www.wonderopolis.org/wonder/can-you-see-the-wind.