9. Which is true about chemical change? a. It is reversible c. It changes only a material's color and odor. b. It produces new materials d. It does not change a material's size and shape 10. Which shows a chemical change? a. Burning candle c. Burning a piece of paper b. chewing a piece of bread d. Melting a piece of chocolate 11. Which process involves a physical change? a. Frying an egg c. Digestion b. An apple is cut d. bicycle is rust 12. Reuse of stuff would a. Minimize the strain on the environment c. Both a and b option b. Help municipal waste management d. Be difficult and time consum 13. Which of the following is a recyclable material? a. aluminum b. Cardboard C. Glass d. All of the above​