Solar energy is the right awnser
Ice, freezing, or melting then liquid evaporation or condensation, the vapor, deposition the ice again
The definition for "What do you call two or more atoms bonded together" is a compound. Think of water. Water is called H20. Water is made of 2 hydrogen atoms and 1 oxygen atom. That is to atoms bonded together to make a compound which is water. Hope I helped