Question

1. plants gather the suns energy with light - absorbing molecules called

1. what is the principal pigment of plants?

1. how many different types of chlorophyll are in plants and how are they

different?

1. circle the letters of the regions of the visible spectrum in which chlorophyll

absorbs light very well.

a. blue - violet region b. green region
c. red region d. yellow region

Explanation:

• Question 8: Pigments are molecules that absorb light energy. In plants, these light - absorbing molecules are called pigments.
• Question 9: Chlorophyll is the main pigment in plants. It is crucial for photosynthesis as it captures light energy.
• Question 10: There are two main types of chlorophyll in plants, chlorophyll a and chlorophyll b. Chlorophyll a has a methyl group (\(-CH_3\)) attached to a specific carbon in its porphyrin ring, while chlorophyll b has an aldehyde group (\(-CHO\)) at that position. This difference in structure leads to slight differences in their absorption spectra.
• Question 11: Chlorophyll absorbs light very well in the blue - violet and red regions of the visible spectrum. It reflects green light, which is why plants appear green.

Answer:

1. pigments
2. Chlorophyll
3. There are two types of chlorophyll (chlorophyll a and chlorophyll b). Chlorophyll a has a methyl group (\(-CH_3\)) and chlorophyll b has an aldehyde group (\(-CHO\)) in their porphyrin rings.
4. a. blue - violet region, c. red region