3. What will happen if a liquid will be exposed to a very low temperature? a. It will melt. b. It will freeze. c. It will evaporate. 4. What causes rust to form? ? a. reaction of iron to heat b. reaction of iron to force c reaction of iron to oxygen 5. Which of the following will produce rust when wel? a. a ball b. a comb C, a nail 6. It is a form of energy and is described as how high the temperature is a. heat b. sunlight c. temperature