Effects of Water Pollution on Plants
Name
______________________________
Purpose: To see if pollution in water will affect
plants.
Hypothesis: What do you think will happen to the
leaves and veins of the celery when placed in polluted water?
Materials:
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Three stalks of fresh celery per group
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Three Mason jars
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Water
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Red and blue food coloring
Procedure:
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Fill each Mason jar half full with water.
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In one jar add four drops of red food coloring.
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In one jar add four drops of blue food coloring.
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In one jar do not add any food coloring. This is the control
sample. You will compare the other two celery stalks to the one left in
the plain water.
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Cut about 1 inch of the end of the celery off.
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Place one stalk into each of the three jars of water.
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For one week, observe the leaves and stalk veins of the celery
every day. You are looking for a change in coloring the leaves and veins.*
In order to see the veins, you may need to break off a piece of the stem
and look at a cross-section of the stem.
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Record your results by filling in the chart.
Observations:
Compare the control celery's leaves and veins to those
of the polluted plants or changes in color and firmness.
|
Day 1 |
Day 2 |
Day 3 |
Day 4 |
Day 5 |
Day 6 |
Day 7 |
Plain Water
Leaves |
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Plain Water
Veins |
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Red Water
Leaves |
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Red Water
Veins |
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Blue Water
Leaves |
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Blue Water
Veins |
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Conclusion: Summarize your results. State whether
or not your hypothesis was correct or incorrect and why.
Teacher's Guide