1. Van Helmont’s Experiment and Photosynthesis

2. Van Helmont Experiment  5 pound tree  200 pounds of soil  Water is added over a 5 year period  Predict what will happen

3. After 5 years  Soil: 199lbs, 14 oz.  Tree: 169lbs, 3 oz.  lbs.=pounds  oz.=ounces  Were you right?

4. Photosynthesis  The process by which a self-feeding organism can convert light energy into chemical energy in the form of glucose (sugar)  Purpose  To change light energy into chemical energy (stored in the bonds of glucose) C 6 H 12 O 6

5. Photosynthesis: Equation CO 2 + Water Glucose O 2 + O 2 Carbon Dioxide and Water in the presence of Glucose Oxygen Light MAKES Glucose and Oxygen Light

7. Where does it occur?  In chloroplasts  Chloroplasts contain chlorophyll

8. Light Energy  Energy from the sun travels to the earth

9.   Light energy from the sun  Chemical energy in the bonds of glucose (product)  Chemical energy in the bonds of ATP TRACKING ENERGY

10. ATP  A molecule that stores the energy living things need to survive

11. Other photosynthetic organisms  Cyanobacteria, algae, and more!

12. Elodea Lab

13.  How did the tree grow? Use the term photosynthesis in your answer.