1. burning a candle is a chemical change. what is the primary evidence that burning the candle is a chemical reaction? question options: change in color temperature change formation of a solid change in odor 2.maria and carla were hiking when maria tripped, fell, and sprained her ankle. carla took out the first-aid kit and unwrapped a cold pack. carla popped a vial that was inside the cold pack. the two chemicals inside the pack mixed together and the pack began to get icy cold. carla applied the pack to maria's ankle. what kind of reaction occurred in the cold pack? what evidence supports your answer? question options: it is a physical change as evidenced by a drop in temperature. it is a chemical change because heat energy is absorbed and the pack gets colder. it is a chemical change because two different chemicals are mixed together. it is a physical change because the substance in the vial dissolved in the pack's liquid. if you have any questions message me