Rate of photosynthesis

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Ruhul Amin Choudory                Biology

Rate of Photosynthesis

Planning

Introduction

Photosynthesis is the process whereby plants and certain photoautotroph make food using carbon dioxide and water. When both (carbon dioxide and water) are combined, they make the food; glucose as well as oxygen, given off as a by-product. The above description of photosynthesis can be analysed in the equation below:

BALANCED CHEMICAL EQUATION

6CO2 + 6H2O=C6H12O6 + 6O2

WORD EQUATION

Carbon Dioxide + Water=Glucose + Oxygen

Factors that affect photosynthesis:

LIGHT: insufficient light slows down the rate of photosynthesis

CARBON DIOXIDE: similarly, inadequate quantity of carbon dioxide slows down the rate of photosynthesis.

TEMPERATURE: temperature should not be too cold nor too hot.

Aim

My aim is to investigate whether the factor ‘light’, has an affect on the rate of photosynthesis. This will be observed by counting the number of oxygen bubbles given off.

Apparatus

  • Metre rule
  • 5cm Canadian pondweed clipped on a paperclip
  • Beaker
  • Lamp, with 60 watts bulb
  • Water
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Hypothesis

It is predicted that, the more light intensity the higher the rate of photosynthesis, providing that the temperature is not too cold or too hot. I would try and expect the below graph:

Method

The most vital thing, which is needed for photosynthesis is a plant. The plant which will be used in this investigation is a Canadian pondweed. The following is a step by step account which I will take:

1) Make sure that the place is safe by making sure that there are no obstacles on the floor like a bag

2) The room ...

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