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# An Investigation Into the Density of &amp;#147;Mock&amp;#148; Blood.

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Introduction

An Investigation Into the Density of "Mock" Blood. INTRODUCTION The aim of this investigation is to find out the relative densities of three different 'mock' blood samples representing three different people. Sample A represents blood taken from a normal, healthy adult male who lives at sea level. Sample B represents blood taken from the same male after he has undergone six months of regular aerobic exercise. Sample C represents blood taken from the same male after he has spent three months undergoing aerobic training at altitude. PREDICTION I predict that the density of sample A and B will be fairly similar with not a lot of difference between them. ...read more.

Middle

The copper (II) sulphate solution should be made up by dissolving 24.96g of copper (II) sulphate into 1dm3 of water. NB this must be done accurately. 2. Introduce some 'blood' into one of the syringes, fitted with a long needle. 3. Place the tip of the needle just above the surface of the copper (II) sulphate solution. Gently press the plunger on the syringe to release a small drop of the 'blood' into the copper (II) sulphate solution. 4. Record the time taken for the drop to fall between the 100cm3 and 10cm3 marks. 5. Repeat the procedure to obtain TEN readings. ...read more.

Conclusion

Then I used the student's t Distribution to see what percentage of my values lie outside the range -t to +t . (These calculations are on the separate sheets provided). CONCLUSION I believe my results prove that my prediction is correct. Samples A and B are relatively similar, if you compare the means, for example, the mean for sample A is 11.75 seconds and the mean for sample B is 12.70 seconds. These are fairly similar. Especially when in comparison to sample C, for which the mean was 8.77 seconds. These results show that the blood in sample C is denser than the blood in samples A and B. This is due to the structure of the blood in each sample. ...read more.

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