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Q4 Week 9 Allen Photosynthesis Doodle

8th grade science

cocoore
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Q4 Week 9 Allen Photosynthesis Doodle

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  1. Photosynthesis Essential Question: How do plants make food from the sun? Outcome: I can explain the process of photosynthesis.

  2. Photosynthesis Why are Plants Green? • Plants’ cells have chloroplasts, which contain the pigment chlorophyll. • Chlorophyll absorbs most of the colors of the visible light spectrum except green, which is reflected. • Notice that red is reflected from the flower and green from the leaf.

  3. Photosynthesis Three Reactants are Needed for a Green Plant to Make its Own Food • Energy from the Sun • Water and nutrients from the soil • Carbon Dioxide (CO2) from the air This food-making process is called photosynthesis. This only occurs during the daylight hours. Let’s investigate further into how this process works.

  4. Photosynthesis Chlorophyll Light Energy • The Sun or light from another source hits the leaves. • The pigment chlorophyll (found in the chloroplasts) allows the plant to absorb the light energy. • Only occurs in green leaves Chloroplast

  5. Photosynthesis Carbon Dioxide • CO2 enters the leaf through small openings called the stoma (plural: stomata) • On either side of the stoma are guard cells, which control the opening and closing of the stoma. • Green plants remove tons of CO2 from the atmosphere.

  6. Photosynthesis Two Products are made during Photosynthesis • Sugar (in the form of glucose) • Oxygen (Yay! Just what we need!) In a chemical equation these two things are the products of the chemical reaction. C6H12O6 +  6O2 Oxygen Sugar Remember the small number represents the number of atoms, and the large number represents the number of molecules.

  7. Photosynthesis Oxygen • Oxygen is a byproduct released during photosynthesis. • The O2 moves out of the plant through the stomata. • The process of photosynthesis puts tons of oxygen back into our atmosphere. CO2 O2

  8. Photosynthesis Glucose (sugar) • Transported around the plant as soluble sugar • Plants can turn glucose into starch for storage. • Cells walls in plants are made of starches • Plants also use starches as a source of fuel. C6H12O6

  9. Photosynthesis Respiration • To unlock the energy in the glucose produced by photosynthesis, green plants need to respire. • Respiration creates energy for growth, reproduction, and other life processes. • Unlike photosynthesis, respiration happens both day and night. Cellular Respiration Formula C6H12O6 + 6O2 6CO2 + 6H2O + Energy Glucose oxygen carbon dioxide water energy Notice how this formula is the reverse of the photosynthesis formula. Respiration is a vital chemical reaction in both plants and animals.

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