In Autumn most people enjoy colorful leaves, brought about by external stimuli. In this lesson students explore leaf pigmentation through chromatography.
More about this lesson plan:
Materials Needed: Plant leaf
- Coin or blunt object used to scrape
- 600 ml beaker
- Ruler
- Filter paper
- Liquid solvent - ethyl alcohol
- Pencil or Popsicle stick
- Masking tape
SUGGESTED RESOURCE MATERIALS:
- Johnson, George B., Biology: Visualizing Life. Holt, Rhinehart and Winston, Inc., Orlando, Florida, 1994 and 1998.
- Kaskel, Albert., Hummer, Paul J. and Daniel, Lucille. Biology: An Everyday Experience. Charles E. Merrill Publishing Co., Columbus, Ohio, 1988.
- Strauss, Eric. and Lisowski., Biology: The Web of Life. Scott Foresman-Addison Wesley Publishing Co., Atlanta, Georgia, 1998.
- Encyclopedia Britannica. (hardcopy and/or online)