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Environmental Influences - PowerPoint PPT Presentation


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Environmental Influences. Biotic (Living) Factors. Abiotic (Non-living) Factors. Plants. Light & Heat. Animals. Chemicals. Humans. Weather. Discovery of Photosynthesis. Jan Ingenhousz experiment. John Priestly experiment. Van Helmont experiment.

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Environmental Influences

Biotic

(Living)

Factors

Abiotic

(Non-living)

Factors

Plants

Light &

Heat

Animals

Chemicals

Humans

Weather

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Discovery of Photosynthesis

Jan Ingenhousz experiment

John Priestly experiment

Van Helmont experiment

    • Led to the discovery that plants need light to produce oxygen
  • Performed Priestly’s experiment and discovered that the candle only remained lighted in the presence of light
    • Led to the discovery of the oxygen portion of the photosynthesis equation
  • Placed a lit candle inside a jar, it burned out. Then, he place a mint leaf inside the jar and the candle remained lit because of the production of oxygen by the leaf
    • Led to the discovery of the “hydrate,” or water portion of the carbohydrate produced by photosynthesis
  • Created and experiment to find out if plants grew by taking material out of the soil – massed dry soil and a small seed, after five years the mass of the soil was the sameconcluded that the mass of the plant gained came from the water, did not realize air changed it too