Biology Test1

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Author:
Apalmer22
ID:
170875
Filename:
Biology Test1
Updated:
2012-09-17 14:37:15
Tags:
biology
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Description:
ch 1-6
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  1. Emergent Property
    properties that appear each step up in the hieracrhy of life

    ex. a brain may not work properly even though it has all the parts, must arranged in certain way to function properly
  2. Atom
    the smalles unit of matter that sill retains the properties of an element
  3.  isotope
    when one atom has the same # of protons but different # of neutrons, therefore it also has a greater mass
  4. Radioactive Isotope
    when an isotope is unstable (the nuclei has a tendency to lose particles and energy)

    ex 14C becomes nitrogen after decay
  5. Stable isotope
    when the nuclei do not lose particles and energy

    ex. 12 C 13 C
  6. Valence electrons
    the # of electrons on the outer most shell 
  7. Reactant
    the starting materials of a chemical reaction
  8. products
    what is formed after the chemical reaction


    • REACTANT----------------->PRODUCTS
    •                           reaction
  9. chemical equilibrium
    the point when the reactants and products off set each other exactly.  so no more reactions will happen.
  10. levels of life
    • 1) Molecules 2) Organelles
    • 3) Cells4) Tissues
    • 5) Organs 6) Organisms
    • 7) Populations8) Communities
    • 9) Ecosystems10) Biosphere
  11. 3 types of chemical bonds
    ionic-one atom gains a valence electron from a different atom, forming a negative ion (ANION) and a positive ion (CATION), respectively. These oppositely charged ions are attracted to each other, forming an ionic bond

    covalent(stonrgest)-results when two atoms "share" valence electrons between

    Hydrogen(weakest)-(polar, nonpolar

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