Biology Chepter 2

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  1. Matter
    anything that takes up space
  2. Element
    • sustance that cannot be broken down into other
    • substences
  3. Compound
    consisting of two or more different elements in a fixed ratio- characteristics different than the indivigual element
  4. Essential Elements
    • things that an organism needs to live healthfuly and to reproduce- oxygen, carbon,
    • hydrogen, nitrogen ect.
  5. Trace Elements
    elements only needed in minute quantities
  6. Atomic Number
    number of protons
Author:
Anonymous
ID:
101888
Card Set:
Biology Chepter 2
Updated:
2011-09-15 13:41:45
Tags:
freshman Biology
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Description:
chem basics
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