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As a model of acid rain, learners water plants with three different solutions: water only, vinegar only, vinegar-water mixture.

Discover how the salt in soil affects plant growth with a few seeds, some cotton, and salt. In this hands-on activity, you will plant seeds in 2 different kinds of soil, containing more or less salt.

In this investigation, learners plant seeds in a 2-liter bottle filled with soil that is connected to a water source below. Over the next few weeks, learners observe how the plants grow.

In this activity, learners perform an experiment to find out what determines a flower's color.