Notes 6.2 Photosynthesis & Respira4on 6.2 Cells and Energy In photosynthesis, plants
take in carbon dioxide
and water and release
glucose and oxygen
wastes.
•  Photosynthesis is a chemical reac4on that takes place in the chloroplasts of plant cells. •  During photosynthesis, plants use the energy of sunlight to produce energy-­‐rich molecules called carbohydrates (ex. glucose). Amoeba Sisters: Photosynthesis & the Teeny Tiny Pigment Pancakes Time = 7:45
6.2 Cells and Energy •  Chloroplasts are where photosynthesis occurs. •  Chloroplasts work much like solar cells found in calculators. 6.2 Light and color •  The Sun provides Earth with a steady source of light. •  Your eyes see sunlight as white light, but it is really made up of different colors of light. A clear prism can split white
light into a rainbow of color.
6.2 Light and color •  Light is part of a collec4on of waves known as the electromagne4c spectrum. •  Waves can be described by their wavelength (length from peak to peak), and their energy. 6.2 Light and color •  Color is how we experience the energy of light. 6.2 Chlorophyll •  A pigment is a molecule that absorbs some colors of light and reflects others. •  Chlorophyll is the main pigment used in photosynthesis. 6.2 Chlorophyll •  Chlorophyll absorbs mostly blue and red light, and reflects green light. •  This is why most plants look green. 6.2 Cellular respira4on •  Cellular respira4on is a chemical reac4on that occurs in all living things. •  Cells use oxygen and glucose to produce carbon dioxide, water, and energy. 6.2 Cellular respira4on •  In most eukaryo4c organisms, cellular respira4on takes place in the mitochondria of cells. •  During cellular respira4on, energy is stored in a molecule called ATP while some energy is released as heat. Amoeba Sisters: Cellular Respira4on & the Mighty Mitochondria Time = 7:48
6.2 Comparing photosynthesis and respira4on •  The chemical equa4ons of photosynthesis and respira4on have an interes4ng rela4onship. •  The reactants in photosynthesis are the products in cellular respira4on! •  The reactants in cellular respira4on are the products in photosynthesis! Now do your Photosynthesis & Cell Respira4on Amoeba Sisters worksheet AMOEBA SISTERS: VIDEO RECAP
PHOTOSYNTHESIS AND CELLULAR RESPIRATION COMPARISON
Amoeba Sisters Video Recap: “Photosynthesis and Cellular Respiration”
NOTE: This recap compares two Amoeba Sisters videos: photosynthesis and cellular respiration.
1. In photosynthesis, what are the two major
reactions that take place?
2. Where do each of these reactions take place?
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3. In aerobic cellular respiration, what three
major steps are involved?
4. Where do each of these three major
steps take place (for eukaryotes)?
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Formula Illustrations
For the following formulas, (1) determine whether the formula is photosynthesis or cellular respiration,
(2) circle the products, and (3) creatively illustrate each reactant or product in the box underneath.
5. Formula is for: _______________________________________________________________________
6. Formula is for: _______________________________________________________________________