What is most responsible for the pressure in the Earth's atmosphere?

Question

a) the temperature of the atmosphere b) the volume of the atmosphere c) the high speeds of the molecules d) the weight of the atmosphere e) the density of the atmosphere

Answer 1

d the weight

Answer 2

weight of the atm. due to gravity

Answer 3

The density and earths gravity.  Weight is realtive to density and gravity.  For example, items weigh less on the moon than they weigh on earth due to gravity.  Density of those items remains constant.