Photosynthesis Science Fair Projects and Experiments

Animals that consume plants also make use of this energy, as do those that consume those that consume plants, and so on to the top of the food chain.

As important a job as making all of the world's food is, there's another vital function that photosynthesis performs: It generates the oxygen that oxygen-breathing animals need to survive.


 In the 1600s, Van Helmont performed an experiment to study plants and the soil around them.

Van Helmont's Experiment by Kevin Villegas on Prezi

We exhale the carbon dioxide that plants need for photosynthesis.

Many scientists contributed to the discovery and understanding of photosynthesis throughout the ages; in this page are outlined some of those crucial milestone experiments that contributed to this effort.

Jan Baptista van Helmont, Flemish physician, chemist, and physicist, in the 1600s carried out a famous experiment by growing a willow tree in a pot for five years.

Van Helmont's Experiment In the ..

Van Helmont believed that water was the source of the extra mass and the plant's source of life.

Repeat Helmont's experiment:

, a professor and physician at Cambridge University in the late 1600s, tried to design an experiment to test Van Helmont hypothesis that water was the source of the extra mass.

Private Essay: WHAT did jan van helmont conclude from …

Explain to the students that at the time he was performing his experiments, the composition of the air was unknown and van Helmont didn’t know about carbon dioxide in the air.

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Photosynthesis: The Overall Equation
The Role of Light and Chlorophyll
Brought to You By:
Azaria King
Kourtney Bridges
Yarielis Rosario
Mary Griffith
Emily Batch
Robert Connelly
Brennan McKee
Jan Van Helmont
Joseph Priestley
Jan Ingenhousz
In the year 1779, Ingenhousz concluded that plants need sunlight in order produce oxygen.
He discovered that aquatic plants
produce oxygen in the light, but not in
the dark.

He knew nothing of photosynthesis, ..

At this time share with the students that scientists have indeed come up with an explanation of how plants get the food they need to grow from a small seed or as in van Helmont’s experiment from a sapling to a tree.

Photosynthesis and Baptista Van Helmont Essay …

Van Helmont tried to demonstrate his water theory by means of quantitative experiment. He planted a tree in a pot containing a weighed amount of earth. For 5 years he nourished the tree only with water. He found that the weight of the tree had gained 164 pounds while the weight of the earth in the pot was approximately the same as at the beginning of the experiment. He thus attributed the increase in weight of the tree to the assimilation and transformation of water into the substance of the tree.

Jan Ingenhousz Photosynthesis Experiment - …

Follow in the steps of van Helmont, John Woodward, Joseph Priestley and Jan Ingenhousz and discover photosynthesisIs plant growth affected by exposure to ultraviolet light?

The Discovery of Photosynthesis

To Van Helmont, diseases were caused by the invasion of the body by foreign ferments which interfered with the controlling action of the ferments of particular organs. Thus diseases had to be studied and treated as individual specific complaints with their own individual and specific cures. Although the Helmontian view of nature did not claim many adherents in the second half of the 17th century, his works were widely read and appreciated as a source of novel ideas and experiments.