1. 1/12 - 8th Grade Agenda Learning Objective: Learn about Polymers
Collect HW: Reading & Notetaking: p.143 – 144
Video: None of the Above
Textbook Reading p
HW: Reading & Notetaking p.146 – 147
Reminder: Last day to turn in late work in 1/13
Reminder HW: Science Fair Background due 1/13 & 1/14 (10 Points)

2. Daily Reflection
Prompt: Although both Diamond and Pencil graphite are made of carbon, why is Diamond harder than Pencil graphite?

3. Diamonds are the hardest substance on Earth. What is it made out of?
Carbon
Diamonds are formed deep within the earth
At very high temperature and pressure, carbon atoms from diamond crystals.

4. Diamonds and Pencil Leads are both made out of pure carbon
Question: Why is a diamond much harder than pencil lead?
Answer: Difference in the arrangement of molecules

5. Carbon has 4 valence electrons
Because Carbon has 4 valence electrons, it is possible for carbon atoms to from chains and rings

6. What kind of Pure Carbon is this?
Fullerene are carbon atoms arranged in shape of a holl______sphere (Discovered 1985)
In a Nanotube, carbon atoms are arranged in the shape of a long, hollow cylinder (Discovered in 1991).
Nanotubes are tiny, light, flexible and extremely stro_______ ow ng

7. What is made of carbon compounds?
Cotton Shirt
Shampoo
Propane
Meat
Vegetable
Paper

8. Which elements does hydrocarbon contain?
Hydrocarbon is a compound that contains only elements hydrogen and carbon.
Hydrocarbons are flammable

9. What is a Isomer?
Compounds that have the same chemical formula but different structural formulas are called isomers
Butanes and isobutane have different melting points and boiling points

10. Double Bond Single bond hydrocarbons end in “-ane” like Propane
Double Bond hydrocarbons end in “-ene” or “-yne” like Ethene.

11. Hydroxyl Group
Hydroxyl group is a “OH” compound used for substitute for hydrogen atom in hydrocarbons
Alcohol is a substituted hydrocarbon that contains one or more hydroxyl group
Ethanol is produced natually by yeast when they consure sugar stored in corn, wheat and barley
Methanol (poisonous)
Ethanol

12. Polymers vs. Monomers
Polymer: A very large molecule (millions of atoms) made of a chain of many smaller molecules.
Monomer: Smaller molecule – the links that make up the chain

13. What are some natural Polymers?

14. What are some examples of Natural Polymers?
Wool
Cotton
Silk
DNA & RNA
Protein
Carbohydrates
Starch

15. What are some man made Polymers?

16. What do plastics and cells in your body have in common?
They are both made of carbon compounds

17. What are the four types of polymers found in all living things?
Carbohydrates
Lipids
Proteins
Nucleic Acids
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18. Carbons can form four covalent bonds
They can also bond to each other in changes and ring shaped groups

19. What are composites
Composites combine two or more substances as a new material with different properties