Aim: How do plants absorb light for photosynthesis?

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Presentation transcript:

Aim: How do plants absorb light for photosynthesis?

What chemical reaction is this?

Why is it called PHOTO …….SYNTHESIS? Photo …….. Light Synthesis…….. To make

Where is the energy coming from? SUN! What color is sunlight? White

Is white light really white? NO! What do you see? ROY G BIV

Where does photosynthesis happen? LEAF!

In what organelles does it happen? CHLOROPLAST!

Why are chloroplasts green? Chlorophyll – green pigment Traps ROY ___ BIV It reflects Green

How do chloroplast trap light energy? They have Chlorophyll green pigment that absorbs all colors Of white light, except_______

Figure 8-5 Chlorophyll Light Absorption Section 8-2 Absorption of Light by Chlorophyll a and Chlorophyll b Chlorophyll b Chlorophyll a V B G Y O R Go to Section:

Would a plant grow in green light? NO!

Chlorophyll is not the only pigment! In the Fall we See the Other colors

What colors do they absorb?

How can we separate these pigments? Chromatography Separates the mixtures. Substances that do not stick tightly to the paper will be picked up by the solvent & moved along quickly

How can we separate these pigments?