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We wanted to see how a root knew to grow down and a shoot knew to grow up. We hypothesised that it was gravity that showed them the way. We fixed bean seeds onto clock mechanisms so the beans were constantly turning. This meant that gravity was constantly changing for them. We noticed that the roots and the shoots grew in a sprial pattern. We concluded that this was because gravity was changing and so each bit of growth went in a different direction causing the spiral to be created.