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Question 8 (2 points) Cracking is (_) the breaking of larger molecules into smaller ones. (_) the combination of small molecules to form larger molecules. () any reaction that is accompanied by the release of heat. C) any reaction that is accompanied by the absorption of heat. Question 9 (2 points) Proteins are polymers of amino acids held together by what type of bonds? (_) protein (_) peptide (_) ester (_) acid Question 10 (2 points) Nathaniel Wyeth developed plastic soft drink bottles. They are made from which polymer? ( ) HDPE ( ) PVC ()PS ) PET