1. How systems depend on CARBON and CHEMICAL ENERGY

2. Why do some things burn and other things do not burn? Why does ethanol behave more like wood than water? Driving question

3. Why does ethanol behave more like wood than water?

4. What we see… Macroscopic Scale WATER WOOD ETHANOL

5. Zooming out… Large Scales WATER (ocean and cloud) WOOD (Forest) ETHANOL (petroleum)

6. WATER (a single droplet) WOOD CELLS ETHANOL (a single droplet) Zooming in… Microscopic Scale

7. Water molecule (H 2 O) Cellulose (C 6 H 10 O 5 )m ( wood is a mixture of many large and small molecules, including cellulose) Ethanol molecule (C 2 H 6 O) Zooming in… Atomic-molecular Scale

8. What ATOMS are found in these materials? Water molecule (H 2 O) Ethanol molecule (C 2 H 6 O) Cellulose (C 6 H 10 O 5 ) M

9. What ATOMS are found in these materials? ATOMS FOUND IN EACH MOLECULE: Water: Hydrogen, Oxygen Ethanol: Hydrogen, Oxygen, Carbon Wood: Hydrogen, Oxygen, Carbon Water molecule (H 2 O) Ethanol molecule (C 2 H 6 O) Cellulose (C 6 H 10 O 5 ) M

10. What BONDS are found in these materials? Water molecule (H 2 O) Ethanol molecule (C 2 H 6 O) Cellulose (C 6 H 10 O 5 ) M

11. What BONDS are found in these materials? Water molecule (H 2 O) Ethanol molecule (C 2 H 6 O) Cellulose (C 6 H 10 O 5 ) M BONDS FOUND IN EACH MOLECULE: Water: H-O Ethanol: H-O, C-O, C-H, C-C Wood: H-O, C-O, C-H, C-C

12. What BONDS are found in these materials? Chemical Energy Energy found in the bonds of molecules. C-C and C-H bonds means molecules have usable chemical energy. So which materials have chemical energy? Water molecule (H 2 O) Ethanol molecule (C 2 H 6 O) Cellulose (C 6 H 10 O 5 ) M

13. Materials That Burn WATER WOOD ETHANOL Materials That Do NOT Burn CARBON DIOXIDE SALT PROPANE BUTANE OXYGEN NITROGEN

14. WATER WOOD ETHANOL CARBON DIOXIDE SALTPROPANE BUTANE OXYGEN NITROGEN What makes these burn? How are these different?

15. What makes something organic? ORGANIC AND INORGANIC MATERIALS

16. Water, Ethanol, and Wood Ethanol is chemically similar wood WATER WOOD ETHANOL

17. MATTER AND ENERGY Every molecule has both ATOMS and BONDS ATOMS TELL YOU ABOUT MATTER BONDS TELL YOU ABOUT ENERGY

18. ORGANIC INORGANIC --means the molecule is CARBON-BASED --and the molecule has C-C and C-H bonds --means the molecule is not CARBON-BASED --and the molecule does not have C-C and C-H bonds

19. What Makes Up Living Things? Inorganic: Water, minerals; Organic: carbohydrates, fats, proteins Average Human Average Apple Average Chicken WaterCarbo- hydrate ProteinFatMinerals Average human 60%1%15%23%<1% Average apple 85%14%0.5% <1% Average chicken 62%<1%30%8%<1%

20. BIOMASS All the organic matter found in living and recently living organisms (this does not include water and minerals that are not incorporated into organic materials).