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Now knowing all these factors affecting the synthesis and destruction of chlorophyll I propose that the amount of chlorophyll in plant depends on light intensity in the following way: with the increase of light intensity the amount of chlorophyll increases, but then it starts decreasing because light intensity exceed the point when there is more chlorophyll destructed than formed.

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Variables.

Independent:

. Light intensity, lux
Constant:

. pH of soil

. water supply, ml

. temperature, to C
Dependent:

. length, cm

. amount of chlorophyll in gram of a plant, gram per gram

III. Method.

Apparatus:

. seeds of Cicer arietinum

. 28 plastic pots

. water

. scissors

. ruler (20 cm ( 0.05 cm)

. CaCO3

. soil (adopted for home plants)

. digital luxmeter (( 0.05 lux)

. test tubes

. H2SO4 (0.01 M solution)

. Pipette (5 cm3 ( 0.05 cm3)

. mortar and pestle

. burette

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