1. Copyright © by Holt, Rinehart and Winston. All rights reserved. ResourcesChapter menu Physical and Chemical Properties Big Picture MS-PS1-2 Analyze and interpret data on the properties of substances before and after the substances interact to determine if a chemical reaction has occurred. MS-PS1-2

2. Copyright © by Holt, Rinehart and Winston. All rights reserved. ResourcesChapter menu Physical and Chemical Properties Do Now What are some plastics that you depend on in your everyday life? How do you know that they are plastics? Write your response in your science journal. MS-PS1-2

3. Copyright © by Holt, Rinehart and Winston. All rights reserved. ResourcesChapter menu Physical and Chemical Properties Objective Understand the impact of new chemicals on society Agenda Today we will: Learn about polymers Complete 3 centers.. Review and exit ticket. MS-PS1-2 Vocabulary polymers monomers biofuel

4. Copyright © by Holt, Rinehart and Winston. All rights reserved. ResourcesChapter menu Section 2 Physical Properties Polymers What are polymers? The word "poly" comes from the Greek word "many "and "mer" means parts A polymer is chemical compound where molecules are bonded together in long repeating chains. These materials, polymers, have unique properties and can be tailored depending on their intended purpose.chemical compound Chapter K1

5. Copyright © by Holt, Rinehart and Winston. All rights reserved. ResourcesChapter menu What is a monomer? –is a molecule that may bind chemically to other molecules to form a polymermoleculebindpolymer

6. Copyright © by Holt, Rinehart and Winston. All rights reserved. ResourcesChapter menu

7. Copyright © by Holt, Rinehart and Winston. All rights reserved. ResourcesChapter menu Polymers Polymers can be either natural or man-made. They generally come from oil (petroleum) or natural gas, but they can also come from other organic materials such as wood fibers, or corn.

8. Copyright © by Holt, Rinehart and Winston. All rights reserved. ResourcesChapter menu Usually, a polymer is made up of one or two types of molecules that repeat down the chain. Polymers can also have branches and multiple chains. Linear polymers have a tight arrangement that leads to a sturdy and rigid polymer.

9. Copyright © by Holt, Rinehart and Winston. All rights reserved. ResourcesChapter menu

10. Copyright © by Holt, Rinehart and Winston. All rights reserved. ResourcesChapter menu There are many types of polymers that we interact with on a daily basis For example plastics are made up of polymers that determine the properties of plastic. Teflon, soft-drink bottles, milk containers and garden hoses are examples of products that are from linear polymers.

11. Copyright © by Holt, Rinehart and Winston. All rights reserved. ResourcesChapter menu Branched polymers are softer and more flexible than linear polymers because they have a looser structure. Examples of branched polymers are soft, flexible plastics such as plastic food wrap and ketchup squeeze bottles.

12. Copyright © by Holt, Rinehart and Winston. All rights reserved. ResourcesChapter menu Polymers are everywhere! Erasers, grocery bags, disposable dishes and utensils, shoes, CDs, clothing, car parts – all of these are made of polymers.

13. Copyright © by Holt, Rinehart and Winston. All rights reserved. ResourcesChapter menu Exit Ticket How have chemical reactions impacted human society? Use specific examples learned in class.

14. Copyright © by Holt, Rinehart and Winston. All rights reserved. ResourcesChapter menu Physical and Chemical Properties Homework Complete worksheet MS-PS1-2