• Join over 1.2 million students every month
  • Accelerate your learning by 29%
  • Unlimited access from just £6.99 per month
  1. 1
  2. 2
  3. 3
  4. 4
  5. 5
  6. 6
  7. 7
  8. 8
  9. 9
  10. 10
  11. 11
  12. 12
  13. 13
  14. 14

An Investigation into a Woodlice's Preferred Choice of Environment.

Extracts from this document...


AN INVESTIGATION INTO A WOODLICE'S PREFERRED CHOICE OF ENVIRONMENT. SCENARIO When he was gardening, Kevin noticed that he rarely ever saw woodlice, but when he lifted stones or wood etc. The woodlice found underneath seemed to run in all directions. HYPOTHESIS Woodlice prefer dark, damp and warm surroundings to light, dry and cold environments, by setting up a choice chamber with all of the available conditions within, I will determine that woodlice do prefer a wetter, darker environment to a lighter, drier one. And I predict that you will find that the woodlice mover quickly to the wet/dark compartment, more so than the other three. Null Hypothesis:- Woodlice do not have a preferred environment for living in. Any difference that occurs will be due to chance factors. BIOLOGICAL KNOWLEDGE Woodlice appear as insects but in fact they are crustaceans. They are one of the only crustaceans known that have adapted to living on land instead of water. Like other insects, they have no shell, and they possess no waxy cuticle, which helps prevent water conservation. Because of this, woodlice are prone to losing water easily via evaporation due to their outer skin being very permeable. This is why they prefer to remain in damp environments. It is said that in dry air, within two hours they will be dead, (www.science.org.uk). By observing them in different environments (e.g. light/dark, wet/dry), a significant difference in their behaviour and reaction should be seen. Woodlice tend to move quicker in dry places than damp places. You may also see them 'clump' together. This helps them to reduce their water loss as it reduces the surface area that is in the open air, as by less air passing their outer layer, less water is lost in that way. This is the same as when some plants that may have adapted to hotter climates have sunken stomata. This serves the same purpose. ...read more.


> Silica Gel - to put underneath the muslin in the dry section of the choice chamber, it will ensure that all moisture is absorbed by it and not by the woodlice. > two identical containers, one for the damp scenario and one for the dry scenario that some woodlice will be placed in via to the experiment. METHOD 1. 10 woodlice will be placed in dry conditions in a container for ten minutes - this will be achieved by placing silica gel underneath some muslin before introducing the woodlice to the container 2. Another 10 woodlice will be placed in wet conditions in a container for 10 minutes - this will be achieved by placing some damp cotton wool/tissue underneath some muslin before introducing the woodlice to the container. 3. Another 10 will be drawn from the other container containing all the woodlice. (Meanwhile the other 30 will remain in the container with things from their natural habitat with leaves, rocks and food.) 4. Whilst the woodlice are in their different conditions, I will begin preparing the choice chamber for each condition by placing damp cotton wool into one half of the choice chamber, and into the other half, I will place some silica gel. 5. Muslin will then be placed all over the choice chamber to ensure the woodlice aren't walking on the cotton wool or the silica gel so they don't experience any discomfort whatsoever. 6. I will then put black paper over half of the choice chamber, this will be the dark region. It will have to ensured that the black paper covers a quarter of the cotton wool and a quarter of the silica gel. All four conditions are now set. (see appendix 1) 7. Once the woodlice have been in there different conditions for the ten minutes, I will move the woodlice from their separate containers 10 out of each condition into the choice chamber. ...read more.


I then put a lamp over the choice chamber and put in twenty woodlice. By counting how many woodlice were visible in the light section of the choice chamber I could then deduct this number from 20 to work out how many were in the dark section. I counted this every 30 seconds for 10 minutes as I had planned to do before. I then repeated this again using another 20 woodlice and placed the other 20 into a container containing things from their natural habitat and some damp cotton wool at the bottom. I did the same thing again with the next twenty and recorded the results in the tables you have just seen in the results section. I then took all the woodlice out and placed them another container with dampness and soil. I then had to change the choice chamber around. By placing the lid back on with the damp cotton wool section underneath the dark region of the chamber. I then used the woodlice that I had used first before and placed them in their and timed and counted again, and then repeated it again but using the woodlice from the second container. This way proved to be a lot more efficient in counting the woodlice. They did seem to clump a lot thought, in all conditions. Thus proving that they do clump to conserve water as was said in the biological knowledge. They also showed a thigmokinesis, they always ensured that they were against something. On occasions it was other woodlice, but in the results where you can see that one woodlouse was on its own at some point it was always up against the edge of the choice chamber. I would therefore say that my experiment had not been a success as the chi-square test proves. Perhaps in order to change it, I would attempt to use a bigger choice chamber, with more woodlice and I would try to change conditions more, and possibly introduce wind into it also. Page 1 ...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 Living Things in their Environment section.

Found what you're looking for?

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

Here's what a teacher thought of this essay

3 star(s)

A good description of the investigation although in places more detail would have been helpful. Some errors and inconsistencies in the experimental design throw uncertainty on the results of the statistical test, and account for this only gaining 3 stars.

Marked by teacher Adam Roberts 30/07/2013

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 Living Things in their Environment essays

  1. Marked by a teacher

    Taxonomy is the branch of biology that deals with the identification and naming of ...

    5 star(s)

    Gram-positive cell walls have a high affinity for the violet stain, and retain it even after they have been rinsed with the alcohol. When the process is complete, they appear dark purple to brown. The difference between the two cell types appears to be in the amount of peptidoglycan in the cell wall.

  2. Marked by a teacher

    A2 Biology Coursework -Investigation into the effect of different concentrations of antibiotics on the ...

    4 star(s)

    I then collected the bacterial solution and the nutrient solution and mixed these 2 together but after opening the lids I waved the necks of the bottles near the Bunsen burner to prevent any contamination 6. I then got 2 beakers and filled 1 beaker with antibiotic solution and

  1. I chose to investigate the behaviour of woodlice in a wet or dry environment.

    I will putt a bit of netting over the top so the woodlice can walk over it. We chose to use 15 woodlice because the more you use it makes it less likely for the results to be due to chance.

  2. Describe the differences between natural ecosystems and ...

    In natural ecosystems the only source of energy is the direct insolation, and the energy is fixed by photosynthesising producers in the form of plant glucose. Conversely, agro-ecosystems have numerous indirect inputs of energy, and farmers import energy in order to maximise the growth and yield from crops.

  1. explain why Antarctica is so special and therefore why we need to protect it, ...

    The table below shows various metallic minerals, how they are formed and what they are used for. Minerals Possible Uses Iron Sedimentation Steel making Cobalt Hydrothermal Petroleum Refining, Pigments Chromium Magmatic Segregation Heat & Corrosion Resistant Steel Segregation Nickel Magmatic Segregation Stainless Steel, Heat & Corrosion-Resistant Steel Copper Hydrothermal Sedimentation Alloys with Tin (Bronze)

  2. An Investigation To Observe the Preferred Habitat of common rough woodlice.

    Their exoskeleton is not waterproof which means that they will also loose water through this. Fig 1. Dorsal View of Porcellio scaber The ventral view of the anatomy of Woodlice (fig. 2) shows that they have simple pseudo-lungs as their respiratory surface and this is also towards the rear4.

  1. The importance uses of micro organisms.

    It was from the mould Penicillium notatum that is one of several green moulds. Protozoa's are another type of microorganism. These are minute acellular of unicellular organisms usually nonphotosynthetic. These tiny organisms are very important to animals and humans. Protozoa's are to a certain extent responsible for the chalk cliffs in Southern England.

  2. Antibiotic Sensitivity Test

    Step 3 Very gently move the petri-dish side to side, up and down and in circles to spread the bacterial cells throughout the agar.

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