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One of the
multimedia modules found often in Multimedia Science
software is the computer simulation. If a picture
is worth a thousand words, than an animated simulation must be
worth a million words. There are many real world processes that
are very difficult to explain clearly by verbal explanation and
drawing on an overhead, chalkboard, or whiteboard. There are several
reasons why a simulation can help teach difficult science concepts:
- Students can visually see the real life situation
and watch as the illustrated processes play out on the screen
- A change in color or sounds can be added to
visually show changes in the variables being studied
- The instructor or student can change the values of a selected
variable and see or measure how other variables change
Let's take
a look at an example simulation. The screen shot below is from
one of the multimedia modules from Chemistry Games,
Labs, & Demos - the Equilibrium Simulator. Click
on the Chemistry tab from the home page for more information
on this software.
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First,
the coefficients in the general equation A + B = C + D are set.
Then the numbers of molecules of A, B, C, and D are set by using
the sliders on the left side of the screen. The reactants are shown
in red and the products are shown in blue. Finally, the equilibrium
constant is set. The reaction can be set in motion, stopped at any
point, or restarted by clicking on the Start and Stop buttons. Students
can see the molecules changing color as they bounce around the screen
and the reaction proceeds. They can also see how the numbers in
the equilibrium expression changes as the reaction moves towards
equilibrium. The equilibrium constant can be changed during the
simulation to show how the amounts of product and reactant change
at different equilibrium constants. Using this simulation students
can see the reaction progress and the relationship to the equilibrium
expression. |
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