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Biology - CH4- L3

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    Grade 4 - Chapter 4 - L3
  •   Study   Slideshow
  • What is the meaning of "Photosynthesis" ?
    The process that helps leaves make food.
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  • What do plants need to make their food?
    Sunlight / Carbon Dioxide / water
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  • What is the roots' function in the process of photosynthesis ?
    Absorb water and minerals from the soil.
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  • What is the leaves' function in the process of photosynthesis?
    1- Absorb carbon dioxide / 2- the chlorophyl inside of leaves captures energy from the sun
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  • Explain: How plants make their food ( the process of photosynthesis )
    water and minerals (roots) + Carbon dioxide (leaf) + sunlight (captured by chlorophyl) = Combine to make food in the leaves
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  • What do plants release in the process of photosynthesis?
    Oxygen
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  • Leaves contain.................. that contains ...........................
    chloroplast // chlorophyl
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  • Explain: Chloroplast (3)
    - A tiny structure containing chlorophyl - The site of photosynthesis - dak green disks connected by threadlike materials
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  • Explain: Chlorophyll
    - A green subtance inside of chloroplast - makes leaves green - captures energy from the sun
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  • What helps the chlorophyll in leaves catch sunlight?
    The shape and positioning helps them catch sunlight to make food
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  • Types of leaves:
    - Most of them are flat - Clover (circle leaf pattern ) - Ash trees (opposite leaf pattern) - Grape vines ( staggered, zigzag leaf pattern)
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  • In what position do stems grow?
    Up towards the light
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  • What protects the stem and prevent them from dying out?
    Waxy covering
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  • What's the diffrence between the stems of many plants and the stems of trees?
    Plants: Green + Soft + flexible + carry out photosynthesis like leaves/ Trees and bushes: hard rigid stems
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  • What is the site of photosynthesis ?
    Chloroplast
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  • What do chloroplasts contain?
    Chlorophyll
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