Photosynthesis: An Overview. Photosynthesis Plants use the energy of sunlight to convert water and...

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Photosynthesis: An Overview

Transcript of Photosynthesis: An Overview. Photosynthesis Plants use the energy of sunlight to convert water and...

Page 1: Photosynthesis: An Overview. Photosynthesis Plants use the energy of sunlight to convert water and carbon dioxide into high-energy carbohydrates Photosynthesis.

Photosynthesis: An Overview

Page 2: Photosynthesis: An Overview. Photosynthesis Plants use the energy of sunlight to convert water and carbon dioxide into high-energy carbohydrates Photosynthesis.

Photosynthesis

Plants use the energy of sunlight to convert water and carbon dioxide into high-energy carbohydratesPhotosynthesis Equation:

Page 3: Photosynthesis: An Overview. Photosynthesis Plants use the energy of sunlight to convert water and carbon dioxide into high-energy carbohydrates Photosynthesis.

Scientist Investigation

Jan van Helmont (1643)Joseph Preistley (1771)Jan Ingenhousz (1779)

Page 4: Photosynthesis: An Overview. Photosynthesis Plants use the energy of sunlight to convert water and carbon dioxide into high-energy carbohydrates Photosynthesis.

Van Helmont’s Experiment

Measured plant’s water intake and mass increaseConcluded that trees gain most of their mass from water

Page 5: Photosynthesis: An Overview. Photosynthesis Plants use the energy of sunlight to convert water and carbon dioxide into high-energy carbohydrates Photosynthesis.

Joseph Priestley Experiment

Used a jar, candle, flame, and mint leafConcluded that plants give off oxygen

Page 6: Photosynthesis: An Overview. Photosynthesis Plants use the energy of sunlight to convert water and carbon dioxide into high-energy carbohydrates Photosynthesis.

Ingenhousz’s Experiment

Concluded that light is necessary to produce oxygen

Page 7: Photosynthesis: An Overview. Photosynthesis Plants use the energy of sunlight to convert water and carbon dioxide into high-energy carbohydrates Photosynthesis.

What the Experiments Led to:

Other experiments:Discovered that in the presence of light, plants transform carbon dioxide and water into carbohydrates, and they also release oxygen

Page 8: Photosynthesis: An Overview. Photosynthesis Plants use the energy of sunlight to convert water and carbon dioxide into high-energy carbohydrates Photosynthesis.

Process of Photosynthesis

A plant transforms carbon dioxide and waterUsing light energyGives off Oxygen and produces Glucose (a valuable source of energy)

Page 9: Photosynthesis: An Overview. Photosynthesis Plants use the energy of sunlight to convert water and carbon dioxide into high-energy carbohydrates Photosynthesis.

Plants use low-energy raw materials to produce high-energy sugars

Must look at how plants capture energy from then sunPlants gather the sun’s energy with light absorbing molecule~ PIGMENTSThe plants’ principle pigment is chlorophyll a and chlorophyll b

Page 10: Photosynthesis: An Overview. Photosynthesis Plants use the energy of sunlight to convert water and carbon dioxide into high-energy carbohydrates Photosynthesis.

Why are plants typically green?

ROYGBIVChlorophyll absorbs light waves of all colors Reflects the green light