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TEACHER
NOTE
You
can make enough gelatin for a small class using one package
of commerical gelatin dessert. According to package instructions,
mix the contents with .75 cup of boiling water. Wait two minutes
until the powder is completely dissolved. Add another 1.75
cups of cold water. Mix and distribute this solidifying mass
to the student groups.
ANSWERS
- What
did the gelatin represent? (cell cytoplasm)
- What
did the round sprinkle represent? (cell nucleus)
- Why did the bulb of the dropper need to be depressed as
the dropper was introduced into the gelatin? (You needed
first to create a vacuum in the dropper. If the vacuum wasn't
created before the insertion, you'd need to squeeze the
bulb while it was in the gelatin. This would have introduced
air bubbles into the gelatin while disturbing the position
of the target.)
CURRICULUM
LINKS
| Biology:
|
| Living
Systems, The Cell |
|
NATIONAL
SCIENCE STANDARDS (Grades
5-8)
| Science
As Inquiry-Content Standard A |
| Students
should develop abilities necessary to do scientific inquiry, |
|
Students should develop an understanding about scientific
inquiry |
| Life
Science -Content Standard C |
|
Students should develop an understanding of structure
and function in living systems |
 Back
to Teaching Guide
|
