Van Helmont’s Experiment and Photosynthesis

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

After 5 years Soil: 199lbs, 14 oz. Tree: 169lbs, 3 oz.

lbs.=pounds oz.=ounces

Were you right?

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)

C6H12O6

Photosynthesis: Equation

CO2 + Water Glucose + O2

Carbon Dioxide and Water in the presence of

Light MAKES Glucose and Oxygen

Light

Where does it occur? In chloroplasts

Chloroplasts contain chlorophyll

Light Energy Energy from the sun travels to the earth

Light energy from the sun

Chemical energy in the bonds of glucose (product)

Chemical energy in the bonds of ATP

TRACKING ENERGY

ATP A molecule that stores the energy living

things need to survive

Other photosynthetic organisms Cyanobacteria, algae, and more!

Elodea Lab

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