1. (8th) Chapter 8-3 Cornell Notes “Polymers and Composites”

2. (8th) Chapter 8-3 Cornell Notes Key Questions How do polymers form? What are composites made of? How can you reduce the amount of plastic waste?

3. (8th) Chapter 8-3 Cornell Notes protein- amino acid- plastic- composite- Key Terms

4. (8th) Chapter 8-3 Cornell Notes Paragraph 1 polymer: large, complex molecule made of smaller molecules; carbon common atom; common because can have 4 bonds and structures like rings, etc. 1.511 × 511 - en.wikipedia.org511 × 511 - en.wikipedia.org

5. (8th) Chapter 8-3 Cornell Notes Paragraph 2 monomers: smaller molecules that make up polymers in long, repeating pattern chains. 1.511 × 511 - en.wikipedia.org511 × 511 - en.wikipedia.org

6. (8th) Chapter 8-3 Cornell Notes Paragraph 3 polymers either natural or synthetic; natural polymers: 1. cellulose gives strength to plant cells and indigestible to us; 2. starches form from sugar molecules, digestible; 3. proteins made from amino acid combinations, digestible (forms fingernails, carries O2 in blood). 1.511 × 511 - en.wikipedia.org511 × 511 - en.wikipedia.org

7. (8th) Chapter 8-3 Cornell Notes Paragraph 4 synthetic polymers: many made in factories from simple materials like coal, oil; includes carpets, clothing, glue; plastics can be molded or shaped are the most common. 1.511 × 511 - en.wikipedia.org511 × 511 - en.wikipedia.org

8. (8th) Chapter 8-3 Cornell Notes Paragraph 5 composites: combine 2 or more into new material with different properties; can be better than either material alone; many composites include one or more polymers; natural composite: wood; synthetic composite: fiberglass. 1.511 × 511 - en.wikipedia.org511 × 511 - en.wikipedia.org

9. (8th) Chapter 8-3 Cornell Notes Paragraph 6 synthetic polymers: inexpensive to make; strong; last a long time; problem with disposal, creates major trash problem; possible solution: recycling. 1.511 × 511 - en.wikipedia.org511 × 511 - en.wikipedia.org