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Willow Tree Experiment

Decent Essays

Research of
Photosynthesis
By: Daniel Ortiz
Biology 1
1st hour
Jan Baptist van Helmont: Willow Tree experiment In “The Willow Tree experiment” Jan Baptist van
Helmont said that; If you only water a willow tree, then it will grow like a regular tree. In the experiment he used just a regular willow tree and distilled/rainwater. He changed whether he used rainwater, or distilled water to water the tree. Though he kept the plant the same (Willow Tree.)
There wasn’t anything van Helmont was basing the experiment on. The willow tree grew from 5 pounds to 169 pounds after 5 years of growth. Jan Baptist van Helmont concluded that a willow tree can grow completely from just water. He did not account for the weight of leaves that fell off every autumn …show more content…

He realized that the mouse survived longer.
He concluded that the mint leaf produced oxygen needed for the mouse, and the candle to survive. He unfortunately didn’t account for the oxygen he let in whenever he moved the jar around. (l.c.p.#2)
Jan Igenhousz: Elodea & Bubbles
In 1779 Jan Igenhousz conducted a very important experiment about photosynthesis. This experiment consisted of a plant with soil in a jar of water that was exposed to sunlight, and then same plant in the jar of water, but in darkness. He thought if i put a plant in water and expose it in sunlight, then it will produce bubbles. First he submerged the plant in a jar full of water. The sunlight from outside was beaming onto the plant. Because of this
Igenhousz noticed that the plant was producing bubbles from its leaves. So Jan Igenhousz then put the same plant, and jar with water, but this time the plant was put in complete darkness. This time he noticed that the bubbles stopped forming. After gathering the gas that the plant was producing Igenhousz then started to test the gas to find out what it was. He eventually found out that when the plant was exposed to sunlight it produced oxygen! On the other hand when the plant was in darkness then

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