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Chemical And Physical Reactions Quiz

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Chemical And Physical Reactions Quiz

  1. 1. Chemical and Physical Reactions quiz.
  2. 2. 1. What is a chemical reaction? • A chemical change makes a substance that wasn't there before. There may be clues that a chemical reaction took place, such as light, heat, color change, gas production, odor, or sound.
  3. 3. 2. What is a physical reaction? • A physical reaction is the change in the appearance of an object in which it can change back to it's original state.
  4. 4. 3. How are chemical reactions formed? • A chemical reactions is the process by which objects bond together (or break bonds) and, in doing so, either release or consume energy.
  5. 5. 4. How are physical reactions formed? Physical changes occur when objects take a change that does not change their chemical nature.