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Universal Indicator Rainbow Trout
Source Institutions
In this activity, learners cut out a fish and then "paint" it using universal indicator and acids and bases.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-001-001.gif?itok=ya_ijTMA)
Natural Indicators
Source Institutions
Learners combine different plant solutions -- made from fruits, vegetables, and flowers -- with equal amounts of vinegar (acid), water (neutral), and ammonia (base).
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-001-075.jpg?itok=qHpoZumQ)
Acid Rain
Source Institutions
In this chemistry demonstration, acid rain is simulated in a petri dish.
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Rock Bottoms
Source Institutions
Learners add acid rain (nitric acid) to two cups that represent lakes. One cup contains limestone gravel and the other contains granite gravel.
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Foam Peanuts
Source Institutions
Learners compare the properties and solubilities of Styrofoam (TM), ecofoam packing peanuts, and popcorn. First, the solubility of each substance is tested in water.
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Secret Goldenrod Messages
Source Institutions
In this activity, learners write invisible messages on goldenrod paper, and make the message appear and disappear using acids and bases.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-001-839.png?itok=9EgdviNS)
Chemical Identification
Source Institutions
In this activity, learners discover how a cabbage juice indicator helps identify acids and bases, and how iodine indicates the presence of starch.