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Light is one of the factors which affects the rate of photosynthesis. In this investigation a green plant named Canadian pondweed (Elodea) will produce bubbles.
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Light is one of the factors which affects the rate of photosynthesis. In this investigation a green plant named Canadian pondweed (Elodea) will produce bubbles of oxygen as a result of photosynthesis. The number of bubbles of oxygen produced is affected by light intensity.
250 cm^3 beaker lamp glass funnel plasticine test tube 8 cm length of pondweed ( Elodea) metre ruler ± 1 mm sodium hydrogen carbonate powder clamp stand, clamp and boss spatula
Hazard Risk Control measure
Lamps will become hot Burning hand when moving lamp Do not touch lamp until it has cooled down.
B1 Use of appropriate apparatus to make and record a range of measurements accurately, including length, area, mass, time, temperature, volume of liquids and gases, and pH.
B2 Safe use of appropriate heating devices and techniques including use of a Bunsen burner and a water bath or electric heater.
B3 Use of appropriate apparatus and techniques for the observation and measurement of biological changes and or processes.
B4 Safe and ethical use of living organisms (plants or animals) to measure physiological functions and responses to the environment.
B5 Measurement of rates of reaction by a variety of methods including production of gas, uptake of water and colour change of indicator.