Fall Leaves---Science & art

I wish I had found this activity in the spring when I was teaching DD about plants!

Fall Leaves

The colors that appear in fall have been hidden by the green chorophyll.

Draw outlines of leaves; color them with crayons, and paint over the leaf with green tempera.  After the paint dries, use pennies to scratch off some of the paint to reveal orange, red & yellow underneath.  Discuss how it approximates the scientific process.