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9/19 Do Now

9/19 Do Now. Complete the handout on the characteristics of living things. Take out your reading packet and vocabulary list, I will come around and check for completion. . 9/19 LG: What are some basic molecules in our body?. What’s an “atom”?. Everything is made up of atom

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9/19 Do Now

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  1. 9/19Do Now Complete the handout on the characteristics of living things. Take out your reading packet and vocabulary list, I will come around and check for completion.

  2. 9/19 LG: What are some basic molecules in our body?

  3. What’s an “atom”? Everything is made up of atom Atom = “indivisible” or “uncuttable” This indivisible part is called an atom.

  4. Atomic Theory 1. Every element is made of atoms ex: Hydrogen, Oxygen, Carbon, Nitrogen 2. All atoms of any element are the same 3. Atoms of different elements are different 4. Atoms of different elements can combine to form compounds 5. In chemical reactions, atoms are not made, destroyed, or changed

  5. What’s inside an atom? Subatomic particles: Electron (-) Proton (+) Neutron (0)

  6. Molecule Molecule: two or more atoms combine together Ex: water (H2O), carbon dioxide (CO2)

  7. Macromolecule • Macromolecules are • “BIG” molecules • Building blocks of life!

  8. Organic vs. Inorganic Organic Compounds: must contains both elements Carbon (C) and Hydrogen (H). ex: carbohydrates, lipids, proteins, and nucleic acids Inorganic Compounds: don’t contains both elements Carbon (C) and Hydrogen (H). ex: salts, minerals, water, carbon dioxide

  9. Chemistry of Carbon The Carbon Cycle http://www.bbc.co.uk/schools/gcsebitesize/science/ocr_gateway/understanding_environment/recyclingact.shtml

  10. Macromolecules are found in food! Pringles Sour cream & onion Pringles Salt & Vinegar

  11. Life Macromolecule 1: CarbohydratesBuilding block: sugars • Carbohydrate (sugar) = Carbon + Hydrogen + Oxygen • Living things use carbohydrate as their main source of energy (ex: sugar) ex: starch, cellulose, glucose

  12. Life Macromolecule 2: LipidsBuilding blocks: fatty acids + glycerol Lipids (fats) = Fatty Acids + Glycerol Fatty Acid=Carbon + A Lot of Hydrogen Glycerol=Carbon + Hydrogen + Oxygen

  13. Life Macromolecule 3: ProteinsBuilding blocks: amino acids (20 kinds) Proteins = Amino Acids + Amino Acids + … Amino Acids= Carbon + Nitrogen + Hydrogen + Oxygen ENZYME is a class of protein (we will come back to this) ex. Insulin In our body: muscle, ligaments, skin and hair

  14. Life Macromolecule 4: Nucleic AcidsBuilding blocks: nucleotides Nucleotide = Carbon + Hydrogen + Oxygen + Nitrogen + Phosphorus Nucleic Acid = nucleotide + nucleotide +… Two types: DNA and RNA

  15. Summary

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