Do Plants Need Light?
Author(s): Nancy Moreno, PhD, and Barbara Tharp, MS.
- Have students rinse away the soil and compare the final masses (in grams) of the plants in pots 1–2 vs. those in pots 3–4.
- As an alternative investigation, conduct the same activity with corn seeds (a monocot), and compare the results.
- Help students to “see” chlorophyll, the pigments essential for converting light energy into chemical energy (food molecules), by placing a handful of crushed fresh leaves (any kind) into a clear container filled with about 2 cm of rubbing alcohol. Stir the mixture briefly and insert the tip of a strip of coffee filter paper into the alcohol. The chlorophyll pigments will travel up the paper strip and form a green band that will be visible after about 1/2 hour. This method of separating chemicals in solution is known as paper chromatography.
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Funded by the following grant(s)
My Health My World: National Dissemination
Grant Number: 5R25ES009259
The Environment as a Context for Opportunities in Schools
Grant Number: 5R25ES010698, R25ES06932