SCIENCE:
Acid Rain
Today's Snack: Vinegar
can do harm, as in the experiment below, but it also can do good things with
food. Mix vinegar with salad oil and a packet of dry salad dressing mix, and
pour a few spoonfuls over a bowl full of cherry tomatoes, zucchini slices,
squash slices, diced green pepper, crispy carrot chunks and sliced celery.
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Supplies:
20 seeds per student or
team
2 zip-lock bags | 2
paper towels
Vinegar | Water |
tablespoon | Sharpie pen | small container
- Fold a paper towel so that it
will fit it inside a zip-lock bag.
- Fold the other paper towel the
same size.
- Moisten one of the paper towels
in one of the sacks with a tablespoon or two of water.
- Count 10 seeds and place them
between the layers of the paper towel.
- Slide the paper towel and seeds
into one of the zip-lock bags.
- Label that bag "WATER" with the
Sharpie pen.
- 4. Now, for the other sack: in
the small container, mix one tablespoon of vinegar and one tablespoon of
water. Moisten the other paper towel with the vinegar-water mixture.
- 5. Count out another 10 seeds
and place them between the layers of the paper towel moistened with
vinegar and water.
- Label that bag "VINEGAR" with
the Sharpie pen.
- Every two days, inspect your
seeds. Re-moisten the paper towels if they start to dry out - plain water
for the "WATER" bag, and vinegar-water for the "VINEGAR" bag.
- After eight to 10 days, what do
you notice? Why do you think this has happened? Do more research on pollution
in general, and acid rain in particular, and write a short report.
By Susan Darst Williams • www.AfterSchoolTreats.com • Science
09 • © 2010
