Photosynthesis

Ted Talk: Photosynthesis http://ed.ted.com/lessons/the-simple-but-fascinating-story-of-photosynthesis-and-food-amanda-ooten Ted Talk: Photosynthesis

Purpose of Photosynthesis: Plants use the energy of sunlight to convert water and carbon dioxide into high energy carbohydrates (sugars and starches) and oxygen

Equation of Photosynthesis

Where Do the Reactants Come From? 1. Water: Soil 2. Carbon Dioxide (CO2): 3. Sunlight:

Where Do the Reactants Come From? 1. Water: Soil 2. Carbon Dioxide (CO2): atmosphere 3. Sunlight:

Where Do the Reactants Come From? 1. Water: Soil 2. Carbon Dioxide (CO2): atmosphere 3. Sunlight: sun (energy)

Where Do the Reactants Come From? 1. Water: Soil 2. Carbon Dioxide (CO2): atmosphere 3. Sunlight: sun (energy) How? Sunlight travels to the Earth as white light (a mixture of all of the different wavelengths and colors of light)

Where Do the Reactants Come From? 1. Water: Soil 2. Carbon Dioxide (CO2): atmosphere 3. Sunlight: sun (energy) How? Sunlight travels to the Earth as white light (a mixture of all of the different wavelengths and colors of light) Plants capture light energy with a pigment molecule called chlorophyll Chlorophyll A Chlorophyll B

Chlorophyll Chlorophyll absorbs blue, purple, and red light

Chlorophyll Chlorophyll absorbs blue, purple, and red light Chlorophyll reflects green light This is why plants look green!

Chlorophyll Chlorophyll absorbs blue, purple, and red light Chlorophyll reflects green light This is why plants look green! Chlorophyll: a pigment in plants that captures light energy

Chlorophyll Chlorophyll absorbs blue, purple, and red light Chlorophyll reflects green light This is why plants look green! Chlorophyll: a pigment in plants that captures light energy Energy from the light makes photosynthesis work

Where Does Photosynthesis Occur? Chloroplasts of plant cells

Where Does Photosynthesis Occur? Chloroplasts of plant cells Structures: Thylakoids: light collecting units in chloroplasts; light dependent

Where Does Photosynthesis Occur? Chloroplasts of plant cells (2 membranes) Structures: Thylakoids: light collecting units in chloroplasts; light dependent (look like a stack of coins) Stroma: space outside of the thylakoid membrane; light independent

Photosynthesis Song: http://www.educationalrap.com/song/photosynthesis.html