What is the term for a solid that forms when two liquids are mixed together? a. a reactant b. an energy source c. a precipitate d. a solute

In chemistry, the solid that forms when two liquids are mixed together is called a precipitate. Thus, the answer is letter C. The precipitate is insoluble solids formed in the process called precipitation in liquid. They often emerge as suspension in the solution. 

Increase in temperature makes the atoms speed up, and decrease in temperature makes the atoms move slower.