photosynthesis lab report

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Shanshan wang

5/17/06

cell biology

                       Photosynthesis Lab Report

Purpose

The purpose of this experiment is to explore the factors that might affect the rate of photosynthesis. In our own experiment, our purpose was to determine how different light condition/intensity affects the rate of photosynthesis.

Hypothesis

According to the concept of photosynthesis, elodea could produce oxygen and glucose if water and carbon dioxide, light are available. So in our experiment, we try to measure how much oxygen could be produced under different light condition. The higher watt light bulb would provide more heat which could fasten the rate of photosynthesis. So we predicted that the higher watt the light bulb is, the more oxygen will be produced.

Materials

3 beakers

one 25 watt light bulb

one 60 watt light bulb

3 small test tubes

3 sprigs of elodea, each one is 4cm

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Graduate cylinder

Marker

Water

3 lamps

Procedure

1 Use a piece of elodea. Cut the elodea stem and make sure each of the sprigs is 4cm. Put 3 of these pieces to three different test tubes

2 Fill each test tube with water until the top; make sure there is no bubble. And cover it with thin square glass pieces.

3 Fill three beakers with water

4 Gentlely place each of those test tubes to one beaker that is fill with water, make sure the test tube is up side down and there is no bubbles at the end ...

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