What kind of matter is smoke? 1.solution 2.suspension 3.colloid 4.compound 5.molecule

Colloid

Explanation:

Smoke is a colloid. Colloids are special solutions consisting of tiny particles that remain in suspension for a significant amount of time.

the energy to form plasma comes from heat or electricity in the atmosphere!

sunny~ ☺

c. heat could easily travel through the molecules in the air and escape/enter the flask. removing the air slows down the heat transfer.