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

The impact of external factors: water and the carbon dioxide on the rate of photosynthesis.

Extracts from this document...

Introduction

Internal Assessment - Planning The impact of external factors: water and the carbon dioxide on the rate of photosynthesis. 1. Research question Due to the fact that most plants have no appropriate apparatus to ingest and digest food, they have to obtain it by themselves using simple ingredients. That is why plants are called autotrophs or simply "self - feeders". The process of converting carbon dioxide taken from air and water from the soil into complex substances like glucose, is called photosynthesis and can be presented by the equation: 6CO2 + 12H2O ? C6H12O6 + 6O2 + 6 H2O carbon dioxide + water ? glucose + oxygen + water Oxygen, as a waste product, is released to the atmosphere. Photosynthesis demands also a free energy taken from the sunlight that falls on the plant. ...read more.

Middle

Also the temperature should not be forgotten however this factor has not a significant influence on the whole process of photosynthesis (10-18 �C). My target is to consider whether the concentration of carbon dioxide and the light intensity have an impact on the course of photosynthesis in an aquatic plant Elodea Canadensis. My researches will be done with use of the mineral, soda and tap water. Those three will be exposed to the sun light but to check the relationship fully, it is necessary to keep another sample separated - with a mineral water. 2. Hypothesis My predictions will be as follows: First of all, the rate of photosynthesis will be the fastest in a tube with a soda water exposed to the sun light due to the fact that content of the carbon dioxide is higher than in the rest of samples. ...read more.

Conclusion

4. Apparatus I have used: * 4 parts of the plant Elodea (of the same size - 5 cm length) * 4 tubes (of the same size - 15 cm high, and a diameter 1,6 cm) * 4 beakers (of the same size - 7 cm height, diameter 5cm) * 140 ml of tap water * 70 ml of mineral water * 70 ml of soda water * a ruler * a digital stop-watch 5. Methods for the control of variables and collection sufficient relevant data * To obtain results of the influence on the rate of photosynthesis I will observed by a naked eye produced bubbles * The phenomena of producing bubbles will be checked two times after 10 and after 20 minutes of the experiment (those intervals will be controlled with use of a digital stop-watch with an error equals to 0,4 seconds) * The size of an Elodea plant will be checked with a ruler (with an error equals to 1mm) ...read more.

The above preview is unformatted text

This student written piece of work is one of many that can be found in our International Baccalaureate Biology 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 International Baccalaureate Biology essays

  1. Experiment Colours of Light (Wavelength) absorbed by green plant

    On the graph, it can be proven that the spinach will absorb less green wavelength than spinach; hence it's greener colour than mustard. The hypothesis is accepted. APPENDIX Quantitative Data The average percentage of absorbance of wavelength (nm) for the spinach samples exposed in different wavelengths (With respect to standard solution at 0.00nm)

  2. Ecology Open Investigation Does the geographic location affect the biotic and abiotic ...

    All features of the organisms must be compared to a precise and coloured picture or diagram of the organism. Human impacts on the lakes and swamps When collecting the data at Brown Lake, there were canoes and children at the part shown in Image 2.2.

  1. Experiment - Influencing the Rate of Photosynthesis with Light Intensity and Carbon Dioxide Concentration

    Variables and Controls Independent Variable: distance of light to change light intensity, amount of sodium bicarbonate to increase the carbon dioxide concentration Dependent Variable: number of bubbles produced Constant Variables: * Temperature of water inside test tube (room temperature: 16-20 �C )

  2. Factors Affecting the Rate of Photosynthesis Lab

    Solution Conclusion: The results I obtained obviously support my hypothesis that at low light intensities, the rate of photosynthesis is slower than the rate of photosynthesis at higher light intensities, and is very well demonstrated by the above graph. The chlorophyll absorb more light when under higher light intensities, thus allowing increased reaction rates.

  1. Biology- Extended essay. For this research, I investigated the effects of DDT and ...

    1 * Gloves � 1 pair * Goggles � 1pair PROCEDURE: I have divided my analysis into three separate primary investigations. The first investigation consists of the different concentrations of DDT; the second consists of the different concentration of the Azo Dye and the third which consists of a mixture of these two toxins.

  2. Extended Essay- How is production of carbon dioxide (CO2) during digestion affected by the ...

    this energy is used in photosynthesis, allowing the plants to take in carbon dioxide and release oxygen. Carbon dioxide (CO2), water (H2O), and light energy are transformed into oxygen (O2) and carbohydrates (Glucose: C 6 H 12 O 6 ): 6 CO 2 + 6 H 2 O + light

  1. Biology Internal Assessment - investigate whether the Window and Notching caterpillar share the same ...

    This meant that sometimes we may have accidentally measured damage, instead mistaking it for a feeding site. This could have introduced random errors because the distance from the midrib to the damage would have not correlate with our data for the distance from the midrib to the feeding site.

  2. Plan for an experiment - How does temperature affect the rate of photosynthesis?

    The water will only have a negligible effect on the intensity of the light, since it?s both colourless and transparent. Time left in water The time left in the water needs to stay the same for condition to keep it a fair test, as the only condition I?m changing is the temperature of the water.

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