Is it Alive? Experiment

We did an experiment to test whether 5 samples of substances are alive or not. These are the pictures from the experiment.

These are the initial packets of samples given to us.

First, we did a test for water by wetting the cotton wool with 5ml of pure water in a section of the petri dish and placing a spoonful of each of the substances in the section.

This is a close up shot of substances A, B and C.

This is a close up shot of substances D and E.

 Then, we placed some of the remaining substances into 7ml of glucose solution in a test tube. The substances are A, B, C, D and E from left to right respectively.

This photo shows the substances before stirring. We can see that A, C and D completely sank to the bottom of the test tube, E remains floating and B is separated into 2 layers.

This photo shows the substances after stirring.

This is a picture of substance E placed in a salt solution for a period of time. Substance E is actually eggs of a certain organism and the eggs hatched into white shrimps which can be observed under the light microscope.

Link to the tables: http://biojournal04.blogspot.sg/2013/01/is-it-alive.html