Biology

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Author:
8thgradeclass
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236410
Filename:
Biology
Updated:
2013-09-22 22:54:34
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ch.2
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  1. The smallest basic unit of matter
    atom
  2. One particular type of atom that cannot be broken down into a simpler substance by ordinary chemical means
    element
  3. a substance made of atoms of different elements bonded together in a certain ratio
    compound
  4. An atom that has gained or lost one or more electrons
    ion
  5. Forms through the electrical force between oppositely charged ions
    ionic bonds
  6. Forms when atoms share a pair of electrons
    covalent bond
  7. Two or more atoms held together by covalent bonds
    molecule
  8. An attraction between a slightly positive hydrogen atom and a slightly negative atom
    hydrogen bond
  9. The attraction among molecules of a substance
    cohesion
  10. The attraction among molecules of different substances
    adhesion
  11. A mixture of substances that is the same throughout and is a homogeneous mixture
    solution
  12. The substance that is present in the greater amount and that dissolves another substance
    solvent
  13. A substance that is dissolved in a solvent
    solute
  14. A compound that releases a proton (hydrogen ion) when it dissolves in water
    acid
  15. Compounds that removes ions from a solution
    base
  16. Measures a solution's acidity or H+ ion concentration
    pH
  17. Each submit in the complete molecule
    monomer
  18. A large molecule or macro-molecule made of many monomers bonded together
    polymer
  19. Molecules composed of carbon, hydrogen, and oxygen and they include sugars and starches
    Carbohydrates
  20. Nonpolar molecules that includes fats. oils, and cholestrol
    lipids
  21. chains of carbon atoms bonded to hydrogen atoms
    fatty acids
  22. A polymer made of monomers called amino acids
    proteins
  23. Molecules that contains carbon, hydrogen oxygen, and sometimes sulfur
    amino acids
  24. Polymers that are made up of monomers called nucleotides
    nucleic acids
  25. Change substances into different substances by breaking and forming chemical bonds
    chemical reactions
  26. Substances changes during a chemical reaction
    reactant
  27. Substances made by a chemical reaction
    product
  28. The amount of energy that will break a bond between two atoms
    Bond energy
  29. Reached when both the reactants and products are made at the same rate
    equilibrium
  30. The amount of energy that needs to be absorbed for a chemical reaction to start
    Activation Energy
  31. Chemical reaction that releases more energy than it absorbs
    exothermic
  32. Chemical reaction that absorbs more energy than it releases
    endothermic
  33. A substance that decrease the activation energy needed to start a chemical reaction and, as a result, also increase the rate of the chemical reaction
    catalyst
  34. Catalyst for chemical reactions in living things
    enzymes
  35. Specific reactions that an enzyme acts on
    substrates

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