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Activity: Observing
Germination
Problem: What changes can you
observe when a seed germinates?
Materials: seeds (beans or raddish
seeds), 250ml beaker, paper cup (punch drainage hole in bottom),
potting soil, paper towel, masking tape.
Procedure A:
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Label beaker and pot with group
names
- Crumble a piece of paper towel and place loosely
in beaker. Put 2 to 3 seeds between paper and glass at about same depth.
- Place potting soil into paper cup to about 1cm
from top. Place the SAME kind and number of seeds in the soil as you
had in the beaker.
- Add 50 mL of water to both beaker and cup.
- Place both in tray on cart.
- Over the next week, keep paper towel and soil
moist but not so wet that the seeds are under water.
- Make observations and drawing of the seedlings,
making particular attention to the root structure.
Procedure B:
- Design a similar activity to compare the effects
of different conditions on the germination of seeds. Decide which variables
you want to investigate: e.g. different depths of planting, different
temperatures, different degrees of moisture, different light conditions.
- Determine how you will measure and record these
differences.
- As a class, we will set up experiments that
will allow for measurement of the different variables.
Analysis :
- What emerges from a seed first?
- In Procedure 1 you have 2 manipulated variables.
What are they?
- Did the position of the seed affect its germination
in any way? If so, how?
- Compare germination is soil with germination
in a moist paper towel. What difference(s), if any, did you observe?
- What can you infer about the development of
the seeds in moist soil compared with those with moisture but no soil?
- Research and describe what happens within a
seed as it germinates?
- How could you discover the best combination
of conditions for the germination of a particular seed?
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Resources:
Text book page 128, p. 125
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