TwoOldGuys Study Guides
BI-114 BioConcepts for Teachers
Appendix B. Laboratory Exercises
L-5. Lab Exercise 5
Can Plants Reproduce by Breaking Apart?
intended for grade 3 (to 6)
- Question: Will broken branches of a plant grow in new plants?
- Hypothesis: parts broken off a plant can grow into new plants,
I have observed willow trees on new sandbars created by floods on a river. These
willow trees appear to be too old to have grown from seed after the flood.
- alternate hypothesis: parts broken off a plant should die.
- State what observable event is expected to occur because the hypothesis is true:
a branch cut off a willow tree, and 'planted' in water will become new plants.
Materials and Methods
Written just like a recipe, in sufficient detail that anyone should be able to
duplicate your experiment.
- Materials: what supplies are needed (be specific), and how much of each.
- branches cut off a willow tree
- vases (one for each branch)
- Methods: what do you do with the supplies?
- fill vases about 3/4 full of water
- cut bottom end of branch at an angle
- quickly transfer one cut branch into each vase
- experimental design:
- experimental group where conditions are met:
vase with freshly cut branch
- control group where conditions are not met:
- 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."
[optional] you may discuss how this changes our concept of how the Universe works?
This section could also stand alone as a formal essay as can the introduction.
You nay wish to compare branches in water to branches in water with Rootone
added per instructions on the Rootone bottle.
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