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

My hypothesis was that the woody soil would be the worst for plant growth, and that the most organic may be the best.

Extracts from this document...


We had started off thinking of how we can unite physics and biology together in the same experiment. After thinking about plants and electricity we thought we could see if electrically functioning lights can succeed in substituting the sun light. We had decided to use two different artificial lights with different colors and the sunlight. We had also thought that we would need a plant that is easy and a fast grower. We couldn't provide ourselves with some genetically modified seeds as we didn't have the contact, but instead we decided to use lentils as they are the fastest growing plant we had the possibility of acquiring. We then thought about the soil in which the plants would be placed. We thus decided to also have three different types of soil. The first is organic, the second is moist organic, and the third is woody soil. The next problem was the question of how to set up the apparatus. What is required out of the apparatus is that it can provide a close environment that would not let any light come in. the main goal is to be able to feed the plants with only the artificial lights, it must be ensured that no other alien light can come in. The containers we used had some holes to allow for oxygenation, they were cardboard boxes. ...read more.


cm 3 cm 6 cm 7 cm Moist organic Day 1 Day 5 Day 6 Day 7 Day 11 Day 12 Purple light 0 cm 2.5 cm 4.5 cm 5.5 cm died Died Yellow light 0 cm 0 cm 0 cm 0 cm 0 cm 0 cm Natural light 0 cm 5 cm 9 cm 12 cm 15 cm 16 cm The firs thing that we notice is that the yellow light has no growth what so ever. This is strange as it has a lower intensity than the other lights. What is probably is that the seeds were killed due to heat, and lack of water. Not to mention that yellow is very close to green on the light spectrum. This means that the plant can't use much of the yellow light to grow. The reason for which the plant is green to our eyes is because it's the only color it is not, in the light spectrum yellow and green are very close. Having a green light shine on the plant would result in worse results (if that is possible). As we were unable to be present during the experiment to overview it for a great majority of the time, we didn't get very consistent results. What would've been optimum would've been a day by day measurement. What I ended up doing in order to have an idea of the exact rate of growth is divide the final length of the plant by the number of days. ...read more.


It would be good to obtain some high intensity color lamps which would stay cool somehow, so as to have the plants have the same temperatures. The change wasn't great, the temperature achieved 42 degrees inside the boxes, and when it cooled down for 40 minutes, it came down to ambient temperature. The amount of soil was not measured and the amount of seeds planted might not have been too many for the small box, and some of them might not have been properly germinated. This kind of information is necessary for it helps us find out what is the optimum most efficient mean to grow the biggest plants. This could then help us grow more food, and feed more people in the world. What is to be doubted is that maybe different plants have different means of growth. As the tomato is red, it might prefer different colors than lentils. In conclusion this experiment was not run properly. The results were not precise enough as they didn't fit together at time. An example would be when the organic soil gave better results for the sunlit lamp, and the moist organic gave the best results for the purple light. What can be deduced from this experiment is that yellow light isn't good for growing plants, but this should be tested further as well. Other colors should be tested out, and on different plants as well as different soils. For these results might only apply to lentils. So far, the natural way seems to be the best way for plant growth. ...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. Mangrove Soil Analysis

    The flora that grows on the beach is hardy (casuarinas and Spinifex). This is due to the limited amount of water and nutrients available. The highest percentage of Silt in the soil samples was Stoney Creek rainforest (76.32%). Rainforest is a nutrient high area where flora growth is prominent.

  2. Investigating the growth of Lemna (Duckweed)

    Rose flowers may droop at the neck. Sulphur: Sulphur helps build the plant proteins by forming the cross-links in the proteins called sulphur-bridges. Therefore a deficiency would result in similar conditions as a nitrogen deficiency. Iron is a catalyst throughout the plant; important in chlorophyll and protein formation, enzyme systems, respiration, photosynthesis, and energy transfer.

  1. The effects of organic effluent from the seweage on the biodiversty in a freshwater ...

    This factor will be taken into account when looking at the variations between the biodiversty of the 3 selected sites . 13. pH metre will be used to test for the acidity or alkalinity of the fresh water tream as the amount of organic effluent decreases when the stream moves away from the sewage.

  2. Free essay

    Solar Desalination Plant

    The concrete supports the acrylic dome structure. 8 Fresh water outlet: allows fresh water from the condensation chamber to be pumped out for distribution. 9 Salt gradient: absorbs and stores heat transferred from the solar absorber to allow a steady boil during times of absence of sun light (usually at night).

  1. Boscastle Floods; A Natural Disaster?

    Financially this kind of disaster is a huge waste, the money that must now be expended to rebuild the town and rebuild the lives of the residents cannot be recuperated in any way. This leads to thoughts of prevention, it might be a good idea to try to prevent a

  2. Experiment Report on Best Fertilisers

    period, and to record nutrients and water levels left in the plants every Week, to determine which fertilizer is the best. Hypothesis- I believe that the Osmocote granule fertilizer will perform the best for this experiment as it is tree seed specific, plus it has the longest release period of

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