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media type="custom" key="28220553" __**AT 1:**__ Algae are tiny, green organisms found in pond water. They are not plants but, like plants, they need light for photosynthesis. Fertilisers help plants to grow. How would you find out if fertilisers also help algae to grow? Which fertilisers would you choose? How would you measure how much algae had or had not grown? (From Page 55 Exploring Science How science works Year 7)

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