1.
Decide on a statement
or question. What is the effect of
soap on the surface tension of water?
(See list below for other ideas.)
2.
Choose a model or
experiment to answer your question or demonstrate your statement.
Control:
glass filled with water Experiment:1
drop of soap
pennies added glass
filled with water
pennies
added
3.
In writing tell what
you did.
a.
Filled a glass with
water.
b.
Slowly added pennies
until water overflowed.
c.
Repeated steps a. and
b. but added 1 drop of soap to water first.
4.
Write results:
a.
After adding 50
pennies, the water overflowed.
b.
One of the properties
of a molecule is that they attract each other.
5.
Tell why this happened.
a.
Pennies displaced the
water. (Liquid matter is made up
of molecules.)
b.
One of the properties
of a molecule is that they attract each other.
c.
Soap somehow reduces
the property of molecules attracting each other.
6.
Make a display. Your display should show what you
did. (Sample of a 3-sided display below.)
Size
restriction:
30 inches long
30
inches high
18
inches deep
7.
Be able to explain what
you did.