Three Questions Poster
Question Rules to Follow Evidence to Look For
The Movement Question: Where are atoms moving?
Where are atoms moving from?Where are atoms going to?
Atoms last forever in combustion and living systems
All materials (solids, liquids, and gases) are made of atoms
When materials change mass, atoms are moving
When materials move, atoms are moving
The Carbon Question: What is happening to carbon atoms?
What molecules are carbon atoms in before the process?
How are the atoms rearranged into new molecules?
Carbon atoms are bound to other atoms in molecules
Atoms can be rearranged to make new molecules
The air has carbon atoms in CO2
Organic materials are made of molecules with carbon atoms• Foods• Fuels• Living and dead plants and
animals
The Energy Question: What is happening to chemical energy?
What forms of energy are involved?
How is energy changing from one form to another?
Energy lasts forever in combustion and living systems
C-C and C-H bonds have more stored chemical energy than C-O and H-O bonds
We can observe indicators of different forms of energy• Organic materials with chemical
energy• Light• Heat energy• Motion
Why do some things burn and other things do not burn?Why does ethanol behave more like wood than water?
Driving question
Zooming in… Atomic-molecular Scale
Ethanol molecule (C2H5OH)
Water molecule (H2O)
Cellulose: an important part of wood (C6H10O5)n
9
What ATOMS are found in these materials?
Ethanol molecule (C2H5OH)
Water molecule (H2O)
Cellulose (C6H10O5)n
10
ATOMS FOUND IN EACH MOLECULE:
Water: Hydrogen, Oxygen
Ethanol: Hydrogen, Oxygen, Carbon
Wood: Hydrogen, Oxygen, Carbon
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
What BONDS are found in these materials?
Ethanol molecule (C2H5OH)
Water molecule (H2O)
Cellulose (C6H10O5)n
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What BONDS are found in these materials?
Ethanol molecule (C2H5OH)
Water molecule (H2O)
Cellulose (C6H10O5)n
Chemical Energy
Energy found in the bonds of molecules. C-C and C-H bonds means molecules have available chemical energy.
So which materials have available chemical energy?
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MATTER AND ENERGYEvery molecule has both ATOMS and BONDS
ATOMS TELL YOU ABOUT MATTER
BONDS TELL YOU ABOUT ENERGY
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Card Sort
• Sort your materials and write your notes on the worksheet.
• Be sure you can tell the difference between organic and inorganic using their ORIGIN and their MOLECULAR STRUCTURE.
Materials That Burn
WATER
Materials That Do NOT Burn
CARBON DIOXIDE
SALT
OXYGENNITROGEN
WOOD
BUTANE
PROPANE ETHANOL15
What makesthese burn?
How are these different?
WATER
CARBON DIOXIDE
SALT
OXYGENNITROGEN
WOOD
PROPANE ETHANOL
BUTANE
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Water, Ethanol, and WoodEthanol and wood both have C-C and C-H bonds.
Ethanol molecule (C2H5OH)
Water molecule (H2O)
Cellulose (C6H10O5)n
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ORGANIC INORGANIC--means the molecule has C-C and C-H bonds
--means the molecule does not have C-C and C-H bonds
WATER
CARBON DIOXIDE
SALT
OXYGENNITROGEN
WOOD
BUTANE
PROPANE ETHANOL18
What Makes Up Living Things?
Inorganic: Water, minerals; Organic: carbohydrates, fats, proteins
Average Human Average Apple Average Chicken
Water Carbo-hydrate
Protein Fat Minerals
Average human
60% 1% 15% 23% <1%
Average apple
85% 14% 0.5% 0.5% <1%
Average chicken
62% <1% 30% 8% <1%