1. Photosynthesis and Light
What happens when light strikes a green leaf?
What is photosynthesis?

2. The Nature of Light Sun: source of Energy for the Earth
Light see from Sun is white light
White Light: made up of red, orange, yellow, green, blue, and violet light

3. When Light Strikes Objects Plants and Light
Plants absorb some colors of light and reflect others
Most of green spectrum reflected and rest of light absorbed

4. When Light Strikes Objects Plants and Light Plant Pigments
Light is absorbed by the plant (blue and red)
Green light is reflected: chlorophyll and leaves green
Accessory pigments: other pigments in leaves that absorb different colors of light; hidden by chlorophyll

7. The Photosynthesis Process
Two-Parts
First: Plants capture energy from the sun
Second: Plant uses energy to produce food
Capturing Energy
Light energy is absorbed by the chloroplasts
The Chemistry of Photosynthesis
Plants need carbon dioxide and water as raw materials
Series of chemical reactions transform C02 and H20 to form sugar and oxygen
The Photosynthesis Equation

8. The Photosynthesis Process
Two-Parts
Capturing Energy
The Photosynthesis Equation
CO2 + H2o C6H12O6 + O2
Takes place where chloroplasts are located in the plant
Energy (sugar) is used for life processes of the plant
Extra sugar is stored by the plant
Oxygen released into the environment