Willow Tree Research Paper

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There are three scientists that explained how plants work and how beneficial they are to us. That air plays a big role, mainly oxygen and carbon dioxide. The three scientists Jan Baptist van Helmont, Joseph Priestly, Jan Igenhousz and their experiments show the presence of light, plants transform carbon dioxide and water into sugar and they also release oxygen.
The first scientists, John Baptist van Helmont shows how his experiment with a willow tree. If we give a willow tree a certain amount of soil, then it should eat it and grow. Helmont kept the time the same, which was five years. He had to measure the weight of the tree before planting and after five years. Helmont also measured how much soil to put in the tree. So the he can determine if the tree ate it and grown form the soil. Then he put some water in the tree after he planted it so that it could hydrate for five years. When five years came Helmont weighed the tree it was much bigger than when he planted it, but the soil was still the same since he left. Then he discovered that it wasn’t the soil that made the willow tree grow, it was the water he gave it. (2) …show more content…
Then they would both live. Priestly measured the type of air that was in the jar and how long the mouse and the plant could survive together. He kept the plant the same in the jar each time for the experiments. The controlled variables that Priestly used were the type of mouse, the jar they put it in and the type of plant also. His first experiment was just a mouse in a jar and the mouse didn’t live very long. Priestley’s second experiment was he put a mouse and a plant under a jar. To see how long the mouse lives with the plant. He concludes that the plant makes the animal live longer, because the plant provided the animal oxygen when the plant was with the animal under the jar than when the mouse was alone in the jar.
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