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Watershed Management Bureau
Interactive Lake Ecology
Sample Experiment
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Surface Tension
Materials:
One of the following for each group:
Needle
Tweezers
Bowl
Water
Procedure:
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- Fill the bowl with water. Using the tweezers, carefully
pick up the needle and place it on top of the water. You may have to try it
several times before you succeed. You will know you have done it correctly
when the needle "floats" on top of the water.
- Observe the needle carefully. How would you describe the
way the needle sits on the water? Write down your observations in your
folder. When it is time, share your thoughts with other students in your
group.
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November, 2002
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