air
posted by malik .
what is air made up of?
what causes wind?

Air is made of nitrogen (78%), oxygen (21%) and argon (0.9%) . There is also about 0.04% CO2.
Wind is caused by atmospheric pressure differences. These in turn are due to uneven heating of the atmosphere and changes in humidity.
Respond to this Question
Similar Questions

6th grade science
What causes the clouds to form on the windward side of the mountain? 
algebra II
An aircraft flew 6 hours with the wind. The return trip took 7 hours against the wind. If the speed of the plane in still air is 276 miles per hour more than the speed of the wind, find the wind speed and the speed of the plane in … 
repost math question
An aircraft flew 6 hours with the wind. The return trip took 7 hours against the wind. If the speed of the plane in still air is 276 miles per hour more than the speed of the wind, find the wind speed and the speed of the plane in … 
Math
An aircraft flew 3hrs with the wind. The return trip took 4hrs against the wind. If the speed of the plane in still air is 180mph more than the speed of the wind, find the wind speed and the speed of the plane in still air. 
College Physics
In Chapter 3 we learned that the force of air drag on an object moving rapidly through the air is proportional to v2, where v is the speed of the ball relative to the air. The same relation applies to the force of the wind on the blades … 
math
A pilot can fly an MD11 2160 miles with the wind in the same time she can fly 1920 miles against the wind. If the speed of the wind is 30 mph, find the speed of the plane in still air.( Source: Air Transport Association of America) 
science
Some parts of the atmosphere are warmer than others. This causes air particles to,which in turn causes the wind. Moves heat by conduction form convestion currents move by radiation become more dense. I am just having a hard … 
Math
The formula W = 35.74 + 0.6215T  35.75V^4/25 + 0.4275TV^4/25 relates the wind chill temperature W to the air temperature T in degrees Fahrenheit and the wind speed V in miles per hour. Use a calculator to find the wind chill to the … 
Math
an aircraft flew 2 hours with the wind. the return trip took 3 hours against the wind. if the speed of the plane in still air is 140 miles per hour more than the speed of the wind, find the wind speed and the speed of the plane in … 
Math
Bill is concerned about the frostbite risk for workers clearing snow. The weather report predicts the air temperature will be 15 degrees Fahrenheit. Joe comes up with an equation relating air temperatures caused by the wind and wind …