Category Hands-on Investigations

Leaf chromatography on four leaves from one tree, from green to red: the yellow was inside the green leaf all summer. A step-by-step method with rubbing alcohol and coffee filters, what you should see, and why.

Simmer autumn leaves in washing soda, brush away everything soft, and keep the network of veins that fed the leaf. Why it works, what the veins are for, and record pages for your results.

Collect acorns, predict, then test them in water: the ones that sink are alive. Look inside, keep the good ones cold for the winter and plant them in spring. Record pages and questions for every grade.