1. a) Explain how the material of a potato is different from the material of a tree trunk.
b) Explain why we can eat the potato but not the pine tree.
2. What do you think an equivalent substance to starch would be in mammals, such as humans? Think about how plants and humans each store surplus "energy")
3. Suppose humans had chlorophyll in their skin and they put on swimsuits and went out and stood in the sunshine
a) Describe the reaction that could, in theory, be carried out
b) How might the water and carbon dioxide get to the skin cells
c) What material would be stored, given off and used by humans?
4. Based on what you've experienced with fruit and vegetables compared to trees, explain what plant parts and materials provide most of the biomass of coal.