5Topic: Photosynthesis Take Notes!Topic: PhotosynthesisPhotosynthesisProcess that uses the sun’s energy to make simple sugars
6This diagram shows how the energy from the sun goes into the plant This diagram shows how the energy from the sun goes into the plant. The plant uses this energy to produce glucose and oxygen. Carbon dioxide comes back to the plant as well as water.
7The general equation for photosynthesis is written as: 6CO2 + 6H2O→C6H12O6 + 6O2Carbon Dioxide + Water Glucose + Oxygen
8Topic: Photosynthesis Take Notes!Topic: PhotosynthesisPhotosynthesis Equation6CO2 + 6H2O→C6H12O6 + 6O2
9Read:The chloroplast is the part of the plant’s leaf where photosynthesis takes place. The chloroplast contains pigments, which are molecules that take in specific wavelengths of sunlight. Wavelengths of sunlight transfer energy. The most common pigment in the chloroplast is chlorophyll. Chlorophyll is a plant pigment that absorbs most wavelengths of sunlight except green. Because it cannot take in the green wavelength, it reflects the green. This is what makes leaves look green. In the fall, leaves stop producing chlorophyll, so other pigments become visible. This gives leaves a wide variety of colors.Read out loud with your table. Answer the questions.
10Chloroplast in plant cells Where does photosynthesis take place?Chloroplast in plant cells2. What is the purpose of pigment?Molecules that take in specific wavelengths of sunlight3. What is the most common pigment in plants?Chlorophyll4. Why do leaves change color in the fall?Plants stop producing chlorophyll so other pigments become visibleLets go over the answers.
11Here is a diagram of a plant cell. Can you find the chloroplasts?
13To trap the energy in the sun’s light, the thylakoid membranes contain pigments, molecules that absorb specific wavelengths of sunlight.
14Chloroplasts contain several kinds of pigments, the most common is chlorophyll.
15Topic: Photosynthesis Take Notes!Topic: PhotosynthesisPigmentsmolecules that absorb specific wavelengths of sunlightChlorophyll most common in leaves
16WHY ARE PLANTS GREEN?Chlorophyll absorbs most wavelengths of light except green. Chlorophyll reflects the green, so that’s what you see!
17Topic: Photosynthesis Take Notes!Topic: PhotosynthesisThe light-dependent reactions convert light energy into chemical energy (ATP)ATP fuels the light-independent reactions that produce simple sugars.Two STAGES of Photosynthesis
192. Looking at the table, what months will all of the leaves be green? The following table shows how much of each pigment is present within a leaf during different months. Use the information to answer the questions that follow.PigmentMayJuneJulyAugustSeptemberOctoberChlorophyll2.922.953.373.151.580.6Xanthophyll1.121.050.890.821.171.32Carotene2.3126.96.36.199.622.881. During which months is the amount of Carotene in a leaf greater than the amount of Chlorophyll?2. Looking at the table, what months will all of the leaves be green?Lets answer these together.