• Join over 1.2 million students every month
  • Accelerate your learning by 29%
  • Unlimited access from just £6.99 per month

Investigate one of the limiting factors on rate of photosynthesis in a water plant

Extracts from this document...


Investigate one of the limiting factors on rate of photosynthesis in a water plant INTRODUCTION Photosynthesis is the process by which plants make their own food for photosynthesis to occur the plants need sunlight energy, the energy is absorbed by a green pigment called chlorophyll which is found in the leaves. This energy then combines with water molecules from the soil, and carbon dioxide from the air. Then as a result of this a type of sugar called glucose is produced and oxygen is made. The equation for photosynthesis is 6co2 + 6H2oc6 H12 o6 + 6o2 There are certain things that affect photosynthesis and these are called limiting factors. Things like light intensity can affect the rate of photosynthesis- we call them limiting factors. It doesn't matter if the plant has lots of carbon dioxide and a nice warm temperature. If light is in short supply, then light will limit the rate of photosynthesis Let's say light intensity is limiting photosynthesis, the only way to increase the rate is to increase the limiting factor. ...read more.


And if the light is further away the rate of photosynthesis will be slower seeing as there will be less light energy used to split up the water. EQUIPMENT LIST Test Tube Clamp Canadian Pond Weed Paperclip Lamp/Torch SAFETY I will have to take care that I do not touch the hot bulb or splash any water on it and I will have to follow the labs safety rules. WHAT I WILL DO I will be counting bubbles because they are bubbles of oxygen; I am carrying out this experiment to find the speed of photosynthesis. In a blacked out room I will hold a light at 5 different distances (10 cm, 20 cm, 30 cm, 40 cm and 50 cm) away from the weed in water for a minute each. And will repeat this 3 times each so that I will have 3 sets of results to work from, to help me recognise anomalous results and to get an accurate average. In order to keep this a fair test I will use the same piece of pond weed and water each time so that I don't ...read more.


lamp is less EVALUATION I think that on the whole my experiment went quite wrong, the results I gathered were VERY strange I believe this to be because of the poor quality of the pondweed that I used. With the set of results that I had, I was able to calculate an average, however this still did not follow my prediction! I believe that my measurements were about as accurate as I could get using the apparatus that we had. I experienced many problems during the experiment; I found that due to the poor quality of my pondweed. It was photosynthesing very slowly at some points, and photosynthesing to quickly to count at others, another problem was when the desk lamp was closer to the pond weed it actually caused the pondweed to be hotter than in the other further away experiments, and so this made for a slightly unfair test! If I could do thsis experiment all over again I would have taken the opportunity to use other peoples results as mine were so strange. By Shahnaz Zarif 10s ?? ?? ?? ?? Shahnaz Zarif 10s ...read more.

The above preview is unformatted text

This student written piece of work is one of many that can be found in our GCSE Green Plants as Organisms section.

Found what you're looking for?

  • Start learning 29% faster today
  • 150,000+ documents available
  • Just £6.99 a month

Not the one? Search for your essay title...
  • Join over 1.2 million students every month
  • Accelerate your learning by 29%
  • Unlimited access from just £6.99 per month

See related essaysSee related essays

Related GCSE Green Plants as Organisms essays

  1. How temperature affects the rate of photosynthesis.

    The light dependant stage is mostly dependant on light as an energy source whereas the light independent stage doesn't depend on light as the source, but on the products of light dependant stage i.e., ATP and reduced NADP. But temperature plays an important part in both the stages.

  2. Investigating the factors, which affect the rate of photosynthesis in a pond plant.

    Experiment Set Up Final Experiment results Temperature in 'C Distance in cm Light Intensity No. of bubbles counted Test 1 Test2 Test3 35 10 1000 120 119 118 35 20 1000 96 92 97 35 30 1000 72 75 71 35 40 824 55 54 58 35 50 721 26

  1. Investigate the factors, which affect photosynthesis.

    * No toxic chemicals to be handled directly. * Always do as instructed by a teacher * After each experiment benches must be tucked away. * Ethylated spirit is toxic and can cause blindness, therefore it is important to wear goggles.

  2. Mangrove Soil Analysis

    hours 9:30 am 48 hours 9:30 am Inner Zone Mud 34 mm 40 mm 52 mm 53 mm 55 mm 105 mm 146 mm 48.7 mm per day Middle Zone Mud 32 mm 33 mm 41 mm 44 mm 45 mm 71 mm 93 mm 31 mm per day Trinity

  1. The aim of my investigation was to determine how limiting factors would affect the ...

    The cells of the palisade parenchyma are cylindrical and contain three to five as many chloroplasts as those of the spongy parenchyma. The chloroplasts stay usually near the cells wall, since this adjustment guarantees optimal use of light. The development and particularly the differentiation of the palisade parenchyma are influenced

  2. Investigating the abiotic factors that affect the size of Ivy leaves in shaded and ...

    Compare the colour against the reading chart. pH 7.5 Darker Green Alkaline pH 7.0 Dark Green Neutral pH 6.5 Green Slightly Acid pH 6.0 Light Green Acid pH 5.5 Orange Acid pH 5.0 Burnt Orange Very Acid pH 4.5 Red Very Acid Potassium Test * Preparing the filter device Unscrew the cap on the filtering device and remove plunger.

  1. Investigate the factors that affect the rate of photosynthesis on a green plant.

    Water is a raw material for photosynthesis and essential to maintain leaf and cell turgor. Any moisture deficiencies to plants result in dehydration of cells and leaves wilting; these effects slow the rate of photosynthesis. Also when the plant is lacking water the stomata will close to reduce water loss.

  2. Which factors affect the rate of photosynthesis?

    The central part of the cell is a vacuole containing cell sap, which is mainly water. The cytoplasm is surrounded by a cell- surface membrane. Chlorophyll pigments absorb the light energy and convert it into food. This is why it is called photosynthesis.

  • Over 160,000 pieces
    of student written work
  • Annotated by
    experienced teachers
  • Ideas and feedback to
    improve your own work