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Biochem 1: Properties of Water
Biochem 1: Properties of Water
Biochem 1: Properties of Water
Biochem 1: Properties of Water
Biochem 1: Properties of Water
Biochem 1: Properties of Water
Biochem 1: Properties of Water
Biochem 1: Properties of Water
Biochem 1: Properties of Water
Biochem 1: Properties of Water
Biochem 1: Properties of Water
Biochem 1: Properties of Water
Biochem 1: Properties of Water
Biochem 1: Properties of Water
Biochem 1: Properties of Water
Biochem 1: Properties of Water
Biochem 1: Properties of Water
Biochem 1: Properties of Water
Biochem 1: Properties of Water
Biochem 1: Properties of Water
Biochem 1: Properties of Water
Biochem 1: Properties of Water
Biochem 1: Properties of Water
Biochem 1: Properties of Water
Biochem 1: Properties of Water
Biochem 1: Properties of Water
Biochem 1: Properties of Water
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Biochem 1: Properties of Water

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  • 1. BellRinger 1) What is a molecule? 2) If you had to guess, what do you think the term “organic macromolecules” means? • Mr. Bowden will collect: • Illustration of the Nitrogen Cycle • NOTES: Biogeochemical Cycles • Sub Assignment: Atoms & Molecules
  • 2. Agenda Collect Homework: Illustration of Nitrogen Cycle Notes: Biogeochemical Cycles Collect Sub Assignment: Atoms and Molecules Worksheet GUIDED NOTES: Biochemistry & Properties of Water Students practice drawing molecules Review Questions
  • 3. INTRODUCTION TO BIOCHEMISTRY
  • 4. ATOMSATOMS Everything in the universe is made of tinyEverything in the universe is made of tiny particles called atomsparticles called atoms Atoms are very, very small. More thanAtoms are very, very small. More than 2,000,000,000,000,000,000,000,000,0002,000,000,000,000,000,000,000,000,000 atomsatoms make up a single drop of water.make up a single drop of water.
  • 5. ATOMIC SYMBOLS The names of Atoms are abbreviated with 1 or 2The names of Atoms are abbreviated with 1 or 2 letters called the Atomic Symbol.letters called the Atomic Symbol. The Atomic Symbol of every type of atom isThe Atomic Symbol of every type of atom is listed in the periodic tablelisted in the periodic table
  • 6. MOLECULES Molecules are groups of atoms thatMolecules are groups of atoms that have been bonded together.have been bonded together.   H2O C6H12O6CO2
  • 7. MOLECULAR FORMULAS A formula lists the atoms that make up aA formula lists the atoms that make up a molecule.molecule. If an atomic symbol is followed by a small numberIf an atomic symbol is followed by a small number then that number is how many atoms of that kindthen that number is how many atoms of that kind are found in the moleculeare found in the molecule Example:Example: NHNH33 = 1 Nitrogen, 3 Hydrogen= 1 Nitrogen, 3 Hydrogen
  • 8. ORGANIC MACROMOLECULES ““Organic” is a word that means Living.Organic” is a word that means Living. ““Macro” is the opposite of “Micro”, so it means Large.Macro” is the opposite of “Micro”, so it means Large. Organic MacromoleculesOrganic Macromolecules areare large molecules that arelarge molecules that are found within living thingsfound within living things Organic molecules are mostly made up of 4 elements:Organic molecules are mostly made up of 4 elements: CarbonCarbon HydrogenHydrogen OxygenOxygen NitrogenNitrogen
  • 9. TYPES OF MACROMOLECULES Macromolecules are made byMacromolecules are made by joining together small unitsjoining together small units called monomers to formcalled monomers to form long chains called polymers.long chains called polymers. There are 4 types:There are 4 types: CarbohydratesCarbohydrates LipidsLipids ProteinsProteins Nucleic AcidsNucleic Acids
  • 10. PROPERTIES OF WATER
  • 11. Water MoleculesWater Molecules A water molecule (HA water molecule (H22O), is madeO), is made up of three atoms --- one oxygenup of three atoms --- one oxygen and two hydrogen.and two hydrogen.
  • 12. POLARITY Water is a neutral molecule, because the negativeWater is a neutral molecule, because the negative charges are balanced by the positive charges.charges are balanced by the positive charges. However, water molecules are polar, meaningHowever, water molecules are polar, meaning they have a partially positive side and a partiallythey have a partially positive side and a partially negative side.negative side. This polarity is due to an uneven distribution ofThis polarity is due to an uneven distribution of electrons between the oxygen and hydrogenelectrons between the oxygen and hydrogen atoms.atoms.
  • 13. POLARITY OF WATER
  • 14. HYDROGEN BONDING When it comes to electricWhen it comes to electric charges, opposites attract.charges, opposites attract. The positive end of oneThe positive end of one water molecule is attractedwater molecule is attracted to the negative end ofto the negative end of another.another. This electrical attractionThis electrical attraction between water moleculesbetween water molecules forms a connection thatforms a connection that scientists call a “Hydrogenscientists call a “Hydrogen Bond”Bond”
  • 15. Properties of WaterProperties of Water 4 important properties of water:4 important properties of water: CohesionCohesion AdhesionAdhesion Resistance to Temperature ChangeResistance to Temperature Change Less Dense as a SolidLess Dense as a Solid
  • 16. CohesionCohesion Attraction between particles of a substance.Attraction between particles of a substance. Cohesive substances stick together.Cohesive substances stick together. Results inResults in surface tensionsurface tension that produces athat produces a film allowing insects to walk on the surfacefilm allowing insects to walk on the surface of waterof water
  • 17. ZeroG Water Balloons
  • 18. AdhesionAdhesion Attraction between two different substances.Attraction between two different substances. Water will make hydrogen bonds with otherWater will make hydrogen bonds with other surfaces such as glass, soil, plant tissues, andsurfaces such as glass, soil, plant tissues, and cotton.cotton. Attached to a silken spider webAttached to a silken spider web Form spheres & hold onto plant leavesForm spheres & hold onto plant leaves
  • 19. Capillary Action Magic Trick
  • 20. Resistance to TemperatureResistance to Temperature ChangeChange Water resistsWater resists temperature change, bothtemperature change, both for heating and cooling. Itfor heating and cooling. It can absorb or releasecan absorb or release large amounts of heatlarge amounts of heat energy with little changeenergy with little change in actual temperature.in actual temperature. This is because theThis is because the hydrogen bonds betweenhydrogen bonds between water molecules work towater molecules work to keep things in a liquidkeep things in a liquid state.state.
  • 21. Water is Less Dense as a SolidWater is Less Dense as a Solid Ice is less dense then liquidIce is less dense then liquid water. That is why icewater. That is why ice floatsfloats Molecules in Liquid WaterMolecules in Liquid Water are constantly breaking andare constantly breaking and reforming hydrogen bonds,reforming hydrogen bonds, meaning they are closemeaning they are close together.together. Frozen water forms aFrozen water forms a crystal-like lattice wherebycrystal-like lattice whereby molecules are spread out atmolecules are spread out at fixed distances.fixed distances.
  • 22. WaterWater IceIce
  • 23. Assignments Drawing and Reading Molecules Review Questions
  • 24. Assignments Drawing and Reading Molecules Review Questions

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