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


Extracts from this document...


HOW SUNLIGHT AFFECTS THE DISTRIBUTION OF A CERTAIN PLANT SPECIE Research Question: How does sunlight affect the distribution of a specific type of plant specie in an area which has approximately the same temperature, soil pH, nutrients, soil salinity and water content? Variables: Dependent variable: distribution of the chosen plant. Independent variable: amount of sunlight in the area. Constant variable: the amount of temperature, soil pH, nutrients, salinity and water content. Hypothesis: Some plants grow well under higher amount of sunlight while others grow well under less amount of sunlight. The plant which has been chosen is likely to grow well in an area which it is not exposed to high amount of sunlight. This is predicted after looking at the area where this type of plant is found and just observing the plant growth and distribution without ant practical work. Apparatus: * Light sensor * TI calculator * CBL Cable * Vanier LabPro (with batteries) * Quadrat The light intensity being emitted from any light source can be measured by the light probe depending on the appropriate range of the light intensity. ...read more.


No. of grids filled in the quadrat by the chosen plant (� 0.5) Quadrat 1 50,800.4 50 28 Quadrat 2 50,700.8 50 32 Quadrat 3 51,800.4 50 2 Quadrat 4 50,900.6 50 25 Quadrat 5 51,700.3 50 5 Quadrat 6 51,800.2 50 3 Quadrat 7 51,100.3 50 15 Quadrat 8 51,000.5 50 21 Quadrat 9 51,000.9 50 17 Quadrat 10 51,500.2 50 11 Data Table: Data processing: Quadrat Number Amount of Sunlight (lux) (� 0.01) Total percentage of grids filled in the quadrat by the chosen plant type (%) (� 0.1) Quadrat 1 50,800.4 (28 x 100) 50 = 56% Quadrat 2 50,700.8 (32 x 100) 50 = 64% Quadrat 3 51,800.4 (2 x 100) 50 = 4% Quadrat 4 50,900.6 (25 x 100) 50 = 50% Quadrat 5 51,700.3 (5 x 100) 50 = 10% Quadrat 6 51,800.2 (3 x 100) 50 = 6% Quadrat 7 51,100.3 (15 x 100) 50 = 30% Quadrat 8 51,000.5 (21 x 100) 50 = 42% Quadrat 9 51,000.9 (17 x 100) 50 = 34% Quadrat 10 51,500.2 (11 x 100) 50 = 22% Quadrat number in order from the least to the greatest percentage fill by the chosen plant Amount of Sunlight (lux) (� 0.01) ...read more.


* The amount of sunlight would not have remained constant and therefore when the light intensity was measures, a higher amount or a less amount of sunlight would have been captured by the light sensor. * Other factors such as temperature, soil pH, nutrients, soil salinity and water content that also determine the plant distribution would not be exactly the same in the whole area and therefore it could have also affect the distribution of the chosen plant type and not only the sunlight. * Since the experiment was just done once, there could have been some errors and so the distribution obtained would not have been totally right. Improvements: * It would have been better if there would be another more accurate way to measure the distribution of a specific chosen plant since measuring it manually may not be as precise as measuring it by using some kind of an electronic instrument. * If the other factors that determine the plant distribution were actually kept constant and not determined, then a more precise distribution of the chosen plant type could have been obtained. * A more accurate result would have been obtained if the experiment would have been repeated more then once, and so an average could have been found. ?? ?? ?? ?? Amrita Raichura 11T Biology: Lab Report ...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

    Hence, more wavelengths is absorbed rather than reflected at these points of wavelengths. However, at the bottom of the graph, it can be deduce that the mustard sample does not really absorb much wavelengths at point 540 nm with an absorption percentage of 1.30%.

  2. The Effects of Salinity on Wheat Germination

    for every dish from that day onwards for the next 13 days. 19. At the point at which the seeds sprout (see definition dependant variable: germination - 1.2.1. treatment of variables), make a measurement of their growth on each day onwards until the 14th day of the experiment at which point the experiment will have ended.

  1. Biodiversity Investigation The aim of this investigation is to determine plant biodiversity of both ...

    from counting plant species and quantity in Location 1 Location 1 Region A (Quadrats next to the pond) Region B (Quadrats 10 feet away) Rye Grass 6 Dandelions Legumes 3 Rumex 8 Chinese Fire Weed Mint 15 Clovers 14 Bermuda Grass 18 Figure 1.2 - Raw Data obtained from counting

  2. Environmental Factors affecting plant growth

    * The fifth treatment contained tubes that contained 100% of sach solution without phosphorus. The tubes of this set were each filled with 22ml of sach solution without phosphorus; a solution that contained all necessary minerals required for plant growth except of phosphorus.

  1. Biology - Observing the Process of Guttation

    o Containers * Same type * Same size Reason: Containers made of different materials may alter plant growth because a plant's surrounding environment (in this case, the container in which it grows in) is extremely important to its growth - the environment should be controlled.

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

    Some data values were imprecise and vague. Each group only carried out one test for each abiotic factor. A mean cannot be calculated for only one result for each factor. Because each group collected their data at different location of the experiment site, the values of the abiotic factor may possibly alter around the site.

  1. Free essay

    Effect of Nitrate Concentration on Plant Growth

    9 11 11 14 7 7 11 12 8 Day 2 9 12 10 8 8 10 8 13 8 9 Day 3 9 15 15 9 12 15 7 13 9 15 Day 4 10 17 18 10 16 15 6 15 11 18 Day 5 10 19 16

  2. How does the salinity of water affect the germination of mung been seeds as ...

    most likely that it would have decreased the number of seeds germinated, causing our mean to decrease, effecting our validity. If I were to repeat this experiment I would use large circular cotton wool pads[4], which would evenly cover the petri dish, causing there to be even insulation and absorbance of solution.

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