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An Investigation to the relationship between the distance the crater is dropped from a the size of the resultant crater.

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Introduction

An Investigation to the relationship between the distance the crater is dropped from a the size of the resultant crater.

Strand P - Planning your investigation.

A crater is a bowl-shaped depression on the surfaces of planets and other bodies in the solar system.  A lot  craters on the earth are formed by volcanic activity although a lot of craters are formed by meteorites.  I am going to use a 88g ball which will replace the meteorite and I will measure the diameter of impact on the sand which replaces the crater.

Prediction: I predict that as the height increases the diameter of the crater will increase too.  I predict this because I know that a force called gravity pulls things of a certain weight down to earth.  An 88g ball will definitely be pulled down to earth by gravity.  The reason I think the higher the fall the larger

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Middle

400

45

450

46

500

47

My results did not vary from a decent enough different in results, I though that the higher the fall of the plasticine ball the larger the diameter of the crater.  This was true but the change was ever so slight.  I figured there was no point plotting these results in a graph because the line would be almost horizontal with a slight positive correlation.

I think that my results showed so little change because the wet sand worked a bit like an adhesive, this probably explains why the sand almost took the same diameter of the ball.  If I change the sand from wet sand to dry sand the impact will in my opinion will more effect upon the diameter of the crater.  I am also going to take twice as much readings  so that the reading will go from 50mm – 1000mm this will make the graph more accurate.

New Method

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Conclusion

Strand E - Evaluation.

The method I used in collecting results was good, I had no problems taking measurements or getting the right height.  I had no problems with the accuracy, observations or measurements in obtaining my results.  My first couple of results were a little bit worrying because they showed quite a big gap but they turned into a positive correlation towards the end, I don’t think this was due to inaccurate readings or to any other fault of my own.  If I was to conduct this experiment again I would take more readings so that I could have enough evidence to support a firm conclusion. If I was to extend this experiment I would have collected more data on the diameter and I would have collected results on the depth of the crater, then I could find the relationship between the depth of the crater and the diameter of the crater, this would provide me with additional evidence for the conclusion.

Richard Carter 10FD

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