Name two places smooth muscles are found

Intestine, Bladder, Stomach, Oesophagus, Bronchi and in the walls of blood vessels.  Most of it is found in internal organs expect for the heart because that is cardiac muscle.

Two places you would find smooth muscles would be in your :

Blood vessels and bladder.

Hope this helps,

Davinia.

well first you need the sample of the temperature and gas level. i couldnt write a hypothesis unless i had some data. i think temperature changes will effect volumes of gas because gas changed into a solid or liquid at specific temperatures.