Question

what needs to be added for a solid to turn into a liquid and then gas?
energy
time
ice

Explanation:

Phase changes from solid to liquid (melting) and liquid to gas (vaporization) are endothermic processes, meaning they require an input of energy to break the intermolecular bonds holding the particles together. Time does not drive the phase change itself, and ice is a solid, not a substance added to cause phase changes.

Answer:

energy