TwoOldGuys Study Guides
BI-114 BioConcepts for Teachers
Appendix B. Laboratory Exercises
L-2. Lab Exercise 2
intended for grade 5 (to 8)
- Do peeled seeds grow better than unpeeled seeds?
- The peeled seeds will begin growing sooner than the unpeeled seeds.
I have been told by gardeners that seeds germinate better if you scratch the
seed coat before you plant the seeds.
- (no entry)
- If the hypothesis is true, then the peeled seeds will emerge as seedlings first,
and the unpeeled seeds will appear as seedlings later.
Materials and Methods
Written just like a recipe, in sufficient detail that anyone should be able to
duplicate your experiment.
- 30 seeds (dried red beans)
- 6 styrofoam coffee cups
- enough black dirt to fill the cups
- Methods: what do you do with the supplies?
- fill cups with soil up to 3/4 inch below rim
- peel 15 seeds, and leave the other 15 unpeeled
- mark 3 cups "peeled" and place 5 peeled seeds in each
- mark 3 cups "unpeeled" and place 5 unpeeled seeds in each
- add 1/2 inch soil on top of seeds
- write "day zero. planted seeds." in notebook
- water daily to keep soil moist to the touch
and write "day 1,2,3..." and how many seedlings are up in notebook
- experimental design:
- experimental group where conditions are met: peeled seeds
- control group where conditions are not met: unpeeled seeds
- Record what actually happened,
and not what you think should have happened.
Depending on the age of your students, this may include descriptions, drawings,
numbers and graphs, ...
- based on data presented:
- "The hypothesis has been proven to be true."
- "The hypothesis has been proven to be false."
This experiment could be exhibited at a Science Fair with an appropriate poster.
The one I saw exhibited at a Fair where my [I was the 'coach'] team of High
School students were Judges, the project won a Blue [2nd place] Ribbon.
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