• Question: why do plants photosymphazise?

    Asked by Science@Ellie Price to Shannah, Richard, Matthew, John, Emma, Anna on 16 Jun 2019.
    • Photo: Emma Markham

      Emma Markham answered on 16 Jun 2019:


      So, plants get there energy from sunlight. Sunlight is different wavelengths (which are different colors), this is what a rainbow is.
      Plants contain Chlorophyll inside chloroplasts, which carries out photosynthesis to capture the energy from sunlight. The plant cannot use all the wavelengths / colours of sunlight, and it only uses red and blue. Because it ‘captures’ red and blue, but it does not need green, so this is reflected and is the colour we see.

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    • Photo: John Paterson

      John Paterson answered on 17 Jun 2019: last edited 17 Jun 2019 11:41 am


      They photosynthesise in order to get food. They combine light from the sun with chemicals from the air and make a kind of sugar from it which, along with chemicals from the soil, they feed on. This is one of the reasons why plants are so important – they are one of the only forms of life that doesn’t need other forms of life to feed on. Because of this, plants are the starting point for a lot of food chains and ecosystems. Also, photosynthesis takes in carbon dioxide so plants are important for stopping climate change.

    • Photo: Richard Gammons

      Richard Gammons answered on 18 Jun 2019:


      In simple terms to make food! Then they can grow and make fruit, flowers!

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