name(s)__________________________________ |
date____________ |
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Classroom activity:
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Purpose: |
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Students will compare two samples collected from the same beach to explore the reasons for differences in grain size. |
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Materials: |
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Two sand samples collected from a San Francisco Beach. One labeled "F" for fore beach and the other labeled "B" for back beach. Graduated cylinder Hand lens Sieve set. Two sieves should be used, each with a different mesh size, so that the sand can be separated by grain size into coarse, medium, and fine. |
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1. Observations: |
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Using the hand lens, observe each sand sample and record observations for each sample on the back of this paper. |
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2. Predict: |
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Predict what you expect to see when you compare the grain size of the sand collected from the back beach to that collected from the front beach.
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3. Measure, sieve and record: |
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4. Interpret: |
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Discuss the differences between the two samples. What do you think is responsible for these differences?
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