Trent science 2

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Author:
jb124
ID:
203890
Filename:
Trent science 2
Updated:
2013-02-27 17:12:48
Tags:
matter
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Description:
matter
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  1. matter is made of extremely small particles called?
    atoms
  2. the term "atom" comes from a Greek word that means?
    "cannot be divided"
  3. a small particle that makes up most types of matter
    atom
  4. pure substances that cannot be changed into simpler substances
    elements
  5. elements are composed of how many kinds of atoms?
    one
  6. elements can be combined to form?
    • compounds
    • mixtures
  7. pure substances that are composed of 2 or more types of elements that are chemically combined
    compounds
  8. compounds can only be changed into simpler substances called ___ by chemical changes
    elements
  9. one way that 2 or more atoms can combine is to form?
    a molecule
  10. composed of 2 or more different substances that retain their own individual properties and are combined physically
    mixtures
  11. mixtures can be separated by?
    physical means (filtration, sifting, or evaporation)
  12. mixtures may be?
    • homogeneous
    • heterogeneous
  13. mixture that is not uniform throughout and the component substances can be visibly distinguished
    heterogeneous
  14. mixture that is uniform throughout and the substances are evenly mixed and cannot be visibly distinguished - particles of the substances are so small that they cannot be easily seen
    homogeneous
  15. another name for homogeneous mixture
    solution
  16. how many types of elements are compounds composed of?
    2 or more
  17. how many different substances are mixtures composed of?
    2 or more

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