1. Aim: How do plants absorb light for photosynthesis?

2. What chemical reaction is this?

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

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

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

6. Where does photosynthesis happen?
LEAF!

7. In what organelles does it happen?
CHLOROPLAST!

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

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

10. 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:

11. Would a plant grow in green light?
NO!

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

13. What colors do they absorb?

15. 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

16. How can we separate these pigments?