Fill in the Blanks Microorganisms Quiz 2Online version This is a fill in the blanks assessment. It is based on lessons 4-6. by Siddeek Ali 1 bacteria harmful viruses helpful germs tiny nutrients break diseases infection yeast useful Yoghurt bacteria Diseases plants infection harmful microscope bacteria nutrients bacteria Mould Microorganisms are very living things . They are so small that you need a to see them . Microorganisms are all around us , in the air , in our bodies and in water . Some microorganisms are to us , but others are to us . Microorganisms that cause are often called . Some diseases , like chickenpox , are caused by . caused by viruses usually spread easily from one person to another . Uncooked foods ( especially meat ) can contain . The are killed when the food is cooked properly . But if you eat food that has not been cooked properly , the may survive and make you feel very ill . Bacteria left in your mouth by not brushing your teeth properly can cause a tooth . Bacteria left in your mouth could also cause an in your ear . is a type of microorganism that grows on decaying food . It can make you ill if you eat it . Here are some examples of microorganisms . When bread is made , a microorganisms called is added to the dough to make the bread rise . 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 bacteria growing . Inside a pile of dead leaves are millions of tiny . These bacteria feed on the leaves and them down into . The go back into the soil where they can be used by .
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