Why does air exert pressure? because air has mass because the atmosphere is thick due to wind moving air due to increased temperature

because air has mass.

Reasoning: The Atmosphere has little to do with the concept here.

Wind moving air, why would that resulting in pressure? Does wind push you aside make you exert pressure?

Though increased temperatures can increase pressure. It doesn't affect it fully.

the correct answer is the first one because air has mass.

when gases molecules hit a surface or wall or in a room, they exert forces on how much particles or how hard their hitting that surface. so the more wild (hot) the molecules are the more pressure there is.

the volume of fluid displaced would equal the volume of the gas. use a gas syringe - this is a laboratory instrument that can be used to withdraw a certain volume of gas from a closed system or to measure the volume of gas from a chemical reaction.

pure substance: iron,copper

impure substance: water,charcoal