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.