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

Plant Lab. What effect does the amount of light have on the growth of a bean plant measured by the height of the bean plant?

Extracts from this document...


Design your own lab By Kaushik Surisetty per.5 Problem: What effect does the amount of light have on the growth of a bean plant measured by the height of the bean plant? Background and Hypothesis: Photosynthesis forms the basis for this experiment. This is the process by which a plant makes food for itself in the form of glucose from the raw materials around it. The energy needed for photosynthesis comes from sunlight, which is the variable for this experiment. The substance that absorbs sunlight is chlorophyll, which is mainly contained in chloroplasts. The energy from the sun is used to split water molecules which is the process photolysis, this through the use off photo systems pump protons in to the lumen of the chloroplast creating a concentration gradient. When protons moved through CFOCF1 complexes to the stroma which has a lower concentration of hydrogen, this creates ATP. This energy is used to convert carbon dioxide (CO2) and water into sugars. This conversion creates the waste product oxygen and the sugar glucose that the plants uses to nether store in food reserves or uses to grow through cellular respiration. The cells of the plant use the glucose to grow roots, cells and stem which results in an increase of height. Without being able to photosynthesize, plants will stop growing and die since there is no form of useable energy for its cells. ...read more.


This increases the amount of light the plant receives and its chances to produce more glucose. 3. Create a closed box is meant to limit the light entering the box. Do this by placing a large black screen in front of the box. To make this screen put a black cloth over the opening. This will limit the light but still let some through so life. 4. Leave the last box alone as it will be our control. 5. For each box poke holes for gas exchange. 6. Make sure to place a collection tray to gather excess water from under the plant. 7. Place these boxes and the plants in the same location which control humidity, temperature and amount of gases available. 8. Make sure pots have holes through the bottom for excess water. Here is a diagram for the set up of this lab: Procedure: 1. Germinate seeds by soaking beans in water overnight, and then placing them in a wet paper towel for half a day. 2. Fill pot with soil and place seed on top of soil and place a light 0.2 cm layer over top. Don't not push Bean into the soil. 3. Let all pots grow and sprout. Some will not sprout. Only 3 plants are needed 4. ...read more.


The sprouting time may have been different depending on seed and its size. The temperature may have been influenced by the high light conditions which would have made a huge difference. Any of these areas could have disrupted the results and mostly likely if there was a contained system that was closely monitored, then there would had been a valid result. The black screen may have influenced the temperature with in the box. The seeds sprouted during different times in the day but for did to be controlled w would have to grow many seeds and take out a average group with this. The results do show that the excessive light did have an impact on plant growth by to be sure it wasn't' the actually behavior or status of the seed it self can't really be controlled. The prediction was partially falsified as the high light growing plant grew close to 10% shown by the 4cm increase but there was a 66% increase when compared to the plant grown in the dark. This is partially because of the underestimation of how low amounts of light effect plants and partially because of the underestimation of the apparatus used. Reference: * Botany Basics. In http://extension.oregonstate.edu/mg/botany/index.html. Retrieved September 7, 2008 from http://extension.oregonstate.edu/mg/botany/photo.html * Biology Coursework by Duncan Garnett Experiment 1-"Comparing the Growth of Plants Grown in the Light and in the Dark." 123HelpMe.com. 07 Sep 2008 <http://www.123HelpMe.com/view.asp?id=147949>. * What is Photosynthesis? Retrieved September 7, 2008 http://www.emc.maricopa.edu/faculty/farabee/BIOBK/BioBookPS.html ?? ?? ?? ?? ...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. The Effects of Salinity on Wheat Germination

    Method 1. Take the Petri dishes and separate them into halves so that there are, in fact, six dishes. 2. Place them on a table in a suitable area with little temperature fluctuation, some sunlight not that much as would cause the seeds to dry out and with minimum disturbance from insects and other factors.

  2. In this extended essay I am looking at the effect of different kind of ...

    Background Knowledge: In my extended essay since I am looking at the effect of music on the growth of the chickpea (gram seed) plant, thus I will first talk about the germination of the seeds and the factors affecting the growth of a plant.

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

    An improvement for the future might be extending the variety of natural and artificial sugars used. This experiment may provide a healthier and less gaseous option for those on a diet or those with diabetes. In the future it would also be an improvement to test the results collected with

  2. biology extended essay - How different diets: vegetarian, vegan and a meat centered diet ...

    ate an healthy and unbalanced diet. They either ate too much or too less of certain nutrients. Healthy participants that is participants with normal blood pressure, normal body mass index and those that exercised frequently all form the different categories of diets stated that they all ate balanced diets.

  1. To stimulate the effect of acid rain on plant life, students to set up ...

    Materials: 100 radish seeds 10-15 filter papers 5 petri dishes 5 beakers, 100ml each 5 droppers pH solutions of (0, 2, 4, 6 and 8) Procedure: 1. Label 5 Petri dishes for each pH solution.

  2. Environmental Factors affecting plant growth

    We also required complete sach solution, sach solution without phosphorus, water retaining gel powder, measuring cylinder to measure the amount of the sach solutions, beakers that contained the sach solutions, syringes also to measure the amount of water or sach solutions, weighing scale to measure the amount of plant gel,

  1. Investigating the Effects of Salt on Seed Germination

    Macintosh HD:Users:160161:Desktop:Screen Shot 2013-08-26 at 7.56.08 PM.png 10. Place on the lids on each petri dish-tightly and with the same amount of force each time so that airflow to the seeds is the same for each petri dish. 11. Move the petri dishes to a suitable location where they will

  2. What is the effect of increasing pH concentration (pH 3, 4, 5, 6 and ...

    Table 8 – processed data table Length of root (±1cm) Length of stem (±1cm) Number of leaves(±1) Color of leaves p H 3 Day 1 0.30 - - - Day 3 2.35 1.61 10 Green Day 5 4.35 2.75 14 Green Day 7 5.30 2.70 18 Fungal infection p H

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