1. Date: December 9, 2016
Aim #30: How do plants absorb light for photosynthesis?
HW:
Daily Review of class notes.
Changing Leaves Article
Unit 3 Test Corrections due Monday
Do Now: Base your answers to the following questions on your knowledge photosynthesis…
Write the chemical equation for photosynthesis.
Write the word equation for photosynthesis.
Circle the reactants
Put a square around the products.
Name one things plants use glucose for.

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

3. What chemical reaction is this?

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

5. 1) Where is the energy coming from?
What color is
sunlight?

6. 2) Is white light really white?
What do you see?
3) What colors make up white light?
ROY G BIV

7. Where does photosynthesis happen?

8. In what organelles does it happen?

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

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

11. 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:

12. 6) Would a plant grow in green light?
No…Why?

13. 7) Chlorophyll is not the only pigment!
In the
Fall we
See the
Others

14. What colors do they absorb?

15. Plant Pigment Video

16. 8) How can we separate these pigments?
Chromatography
Separates the mixture of
pigments. Substances that
have a strong affinity to the
solvent travel further up the
paper.

17. Chromatography- Pigments in Leaf

18. Let’s Review! How do plants absorb energy from the sun?
What is a pigment?
Why does chlorophyll appear green?
Why do leaves change color in the fall?