What is the change that occurs when a substance changes from a gas to a liquid? melting boiling evaporation condensation

Changing from a gas to a liquid is called condensation. Evaporation is the opposite of this process, changing a liquid into a gas (example: boiling water turns into steam/water vapor). Melting and boiling describe temperatures or times during the process of a substance changing states. 

Molecules called lipids have long hydrocarbon chains that determine the way they act. they can be fats, oils, or hormones, and even exist in our cell membranes