Plant food
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Plant food

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Plant food Plant food Presentation Transcript

  • Plant Food
  • What do plants eat?
    • Discuss with a partner what you think plants eat.
  • Plant Food Ingredients
    • Water
    • Carbon Dioxide
    • Light
    • End Product: Sugar!
    • Carbon dioxide + water + sunlight = sugar + oxygen
  • But how is the sugar made?
  • Back up a bit!
    • Photosynthesis takes place in chloroplasts. Remember our first unit lesson about chloroplasts? Chloroplasts contain the chlorophyll that capture light from the sun.
    • How many chloroplasts does a plant have?
    • Some plants have very few chloroplasts, and others, like tree leaves, can have more than fifty!
  • Step 1
    • Light strikes the chlorophyll and energy is used to split apart water molecules into hydrogen and oxygen.
  • Step 2
    • Hydrogen joins with carbon from carbon dioxide and forms sugars.
  • Step 3
    • Oxygen gas is released into the atmosphere.
  • How do plants eat the sugar?
    • The plant stores sugars in its tissues and breaks them down.
    • When the plant is hungry and needs energy it uses the stored energy.
  • Why are plants green?
    • Chlorophyll absorbs most colors of light, but not green! When the sunlight hits chlorophyll green light is reflected back to your eye!
  • Where are the chloroplasts?
    • Leaves hold most of the plant’s chloroplasts. The leaves are the food factory of a plant!
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