Answer:
To cause a phase change, you either add heat energy to a substance to cause it to evaporate, melt, or sublimate, or you subtract heat energy, or take it away, to make the substance freeze or condense. Hope it helps!
Explanation:
Answer:Cells are organized into tissues; and tissues form organs. Organs are organized into organ systems. Example like your muscular system.
Explanation:
The smallest structural and functional unit of an organism is a cell.
