What can most microorganisms be seen with? The human eye The human eye A microscope A microscope A telescope A telescope

Which of these statements about microorganisms is not true? They reproduce They reproduce They feed and grow They feed and grow They are all harmful They are all harmful

What is yeast used for? To cure measles To cure measles To make bread rise To make bread rise To cure a cold To cure a cold

Why should raw and cooked foods be stored apart? Because bacteria only like cooked food Because bacteria only like cooked food Because bacteria only like raw food Because bacteria only like raw food To stop bacteria spreading from one to the other To stop bacteria spreading from one to the other

Which of these is not caused by a microorganism? Chickenpox Chickenpox Tooth decay Tooth decay A broken leg A broken leg

Which of these microorganisms is useful? Bacteria that decompose leaves Bacteria that decompose leaves Measles Measles Bronchitis Bronchitis

Which of these microorganisms is harmful? Bacteria in yoghurt Bacteria in yoghurt Yeast Yeast Bacteria on raw meat Bacteria on raw meat

Which is smaller, bacteria or viruses? They are the same size They are the same size Bacteria Bacteria Viruses Viruses

Why does cleaning teeth prevent tooth decay? Microorganisms don’t like toothpaste Microorganisms don’t like toothpaste Toothpaste removes all microorganisms from the mouth Toothpaste removes all microorganisms from the mouth Cleaning teeth removes sugar which microorganisms like to eat Cleaning teeth removes sugar which microorganisms like to eat