Micro-organisms experiment - 6F

After allowing our mouldy bread experiment to fester over Christmas, we were finally able to write up our findings this week. We were investigating the effect of mould growth on bread that was stored in different containers, or no container at all. Here is Mathusha's write up:


Conclusion:


The bread on the plate had no mould growing on it. The bread in the freezer bag had the most mould and finally, the bread in the Tupperware had the second most mould.


We think this happened because micro-organisms need to breathe and eat so that means the bread in the Tupperware and freezer bag had air for the micro-organisms to breathe and they had the bread to eat however, the bread on the plate (despite providing food to eat and having access to air to breathe) lost its moisture and ended up having no mould on it. It just went hard and dry. This shows us that micro-organisms also need moisture to grow and reproduce.

This means my prediction was wrong. I predicted that the bread on the plate would have the most mould because I thought it would have more air to breathe and reproduce, but the bread in the freezer bag had the most mould and the bread on the plate had no micro-organisms visible.

Evaluation:

The test was fair because we only changed one variable. It would be interesting to test: Putting three different types of bread in the same container (a freezer bag) and you put the three different types of bread in the same location and see which type of bread produces the most mould.