Photosynthesis

Science — Second Preparatory

Factors that affect the rate of photosynthesis

Comparison aspect	Main idea	Keywords
Light intensity	the rate increases as light becomes stronger up to a certain limit and then levels off	rateincreasesbecomesstronger
Carbon dioxide concentration	the rate increases as the concentration of carbon dioxide in the surrounding air increases up to a certain limit	rateincreasessurroundingcertain
Temperature	the enzymes that control the process work best within a suitable range of temperatures. Their efficiency falls when the temperature becomes too high or too low	enzymescontrolprocesswork
Amount of chlorophyll	the more chlorophyll there is the more light is absorbed	lightabsorbed

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