Laboratory work on a theme The dependence of the rate of photosynthesis on light intensity

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Vahrusheva Djulya 10ib

Laboratory work on a theme

“The dependence of the rate of photosynthesis on light intensity”

Introduction

Photosynthesis is a process of converting light energy to chemical energy. The process of photosynthesis takes place in the chloroplasts, specifically using chlorophyll, the green pigment involved in photosynthesis. I had to test one of two reactions of photosynthesis: the light reaction because only it used the light reaction. The main chemical reaction involved in photosynthesis is:

6CO2+6H2O (+light energy) → C6H12O6+6O2

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I controlled all these conditions and made my own experiment, which proved that the light reaction really needs light to produce O2.

Aim

Determine intensity of photosynthesis on allocation of О2, depending on the light exposure.

Variables

Independent variable is the level of the illumination level, which I changed.

Dependent variable is oxygen allocation, which depends on the illumination level.

MATERIALS AND METHODS

Materials

Punch, cups, a solution of baking soda 0.5%, medical syringes with the cylinder 10 ml, glass tubes, the lamp of 100 W, a box, the leaves of plants ...

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