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While in the
ag lab, the students worked in
pairs. When they left, one person had 3 glued
strips using milk glue and the
other using Elmer’s glue. Each strip was to
test for either tinsel (T),
sheer (S) or peel (P) strength. Testing could NOT begin
until the glue dried, which required at least an overnight wait. The students in
Mr. Gantz’s class waited an extra long time because of the snow day on Friday,
followed by a holiday on Monday.
(click on thumbnails)
Prior to discovering which glue
and glue method was stronger,
the class reviewed the terms and processes leading
up to that point in their project.
Mr. Gantz also asked them to look at
the viscosity of the milk glue each of them had made.
Finally, the strength testing began. Each student had a worksheet and was to
chart, on a scale of 1 to 5, what they considered
to be the strength of each of the
glues based on their
observations. The final
activity on the worksheet was the conclusion. The
students reached a variety of conclusions, none were wrong. The class discussed
how different conclusions can come from the same
experiment. The students decided the answer was that the ingredients,
temperature, weight, amount of glue placed on the
paper and all other conditions had to be EXACTLY THE
SAME for everyone to have the same results. The only
absolute conclusion they knew to be true was: It IS
possible to make glue from milk. (and some other ingredients)
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