Sunday 11 December 2011

HELPFUL MICROORGANISM

Helpful microorganisms
Here are some examples of useful microorganisms.
 ·       When bread is made, a microorganisms called yeast is added to the dough to

     make the bread rise.

·         Yoghurt is made by boiling milk and adding special bacteria to it. The
     bacteria turn the sugar in the milk into acid. The acid makes the milk go thick
     and stops any harmful bacteria growing.


·         Inside a pile of dead leaves are millions of tiny bacteria. These bacteria feed on the leaves and break them down into nutrients. The nutrients go back into the soil where they can be used by plants.





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