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Movement of Molecules

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Concentration - measure of how much of a given substance there is ... Hypotonic Solutions contain a low concentration of solute relative to another solution. ... – PowerPoint PPT presentation

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Title: Movement of Molecules


1
Movement of Molecules
  • Osmosis Diffusion

2
Terms to Know
  • Mixture - a substance consisting of two or more
    substances mixed together (not in fixed
    proportions and not with chemical bonding)
  • Homogeneous - describes a sample of matter that
    has uniform characteristics throughout
  • Heterogeneous - describes a sample of matter that
    has parts with different compositions

3
Terms to Know
  • Solution - a homogeneous mixture of two or more
    substances frequently (but not necessarily) a
    liquid solution
  • Solute -a substance that is dissolved in another
    substance, thus forming a solution
  • Solvent -a substance that dissolves other
    substances, thus forming a solution

4
Terms to Know
  • Concentration - measure of how much of a given
    substance there is mixed with another substance
    the number of molecules of a substance in a given
    volume
  • Concentration Gradient - change in the
    concentration of a substance from one area to
    another.

5
Terms to Know
  • Hypotonic The solution on one side of a
    membrane where the solute concentration is less
    than on the other side. Hypotonic Solutions
    contain a low concentration of solute relative to
    another solution.
  • Hypertonic The solution on one side of a
    membrane where the solute concentration is
    greater than on the other side. Hypertonic
    Solutions contain a high concentration of solute
    relative to another solution.

6
Terms to Know
  • Isotonic - Isotonic Solutions contain the same
    concentration of solute as an another solution

7
Concentrations
  • http//www.tvdsb.on.ca/westmin/science/sbi3a1/Cell
    s/Osmosis.htm

8
Terms to Know
  • Diffusion the movement of molecules from areas
    of high concentration to areas of low
    concentration The process where molecules spread
    out to form an even concentration

9
Diffusion Example
  • http//www.wisc-online.com/objects/index_tj.asp?ob
    jidAP1903

10
Terms to Know
  • Osmosis the diffusion of water across a
    selectively permeable membrane the movement of a
    substance dissolved in a solution with a lower
    concentration through a membrane to a solution
    with a higher concentration
  • Selectively permeable - a barrier that allows
    some chemicals to pass but not others. The cell
    membrane is such a barrier.

11
Osmosis Example
  • http//www.wisc-online.com/objects/index_tj.asp?ob
    jidAP11003

12
Sources
  • http//www.tvdsb.on.ca/westmin/science/sbi3a1/Cell
    s/Osmosis.htm
  • www.shodor.org/master/environmental/water/runoff/R
    unoffGlossary.html
  • wordnet.princeton.edu/perl/webwn
  • wblrd.sk.ca/chem30_dev/appendix/glossary.htm
  • http//www.wisc-online.com/objects/index_tj.asp?ob
    jidAP1903
  • www.emc.maricopa.edu/faculty/farabee/BIOBK/BioBook
    glossS.html
  • www.geocities.com/templarser/complexglos.html
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