Microbes: helpful and harmful
Answers are for parents and teachers.
1
Write two helpful and two harmful microbes, and one thing each one does.
Answers differ. Helpful: yeast makes dough rise; lactic acid bacteria make yoghurt. Harmful: Salmonella Typhi causes typhoid fever; Entamoeba histolytica causes dysentery.
2
Draw a poster with four habits for healthy food and hands.
Answers differ: wash fruit and vegetables, cover food, wash hands, brush teeth.
3
Why can antibiotics not treat every illness caused by microbes?
They work on bacteria only, not on viruses or protozoa, and a doctor decides when to use them.
4
Draw the stages of dough rising with yeast as boxes and arrows.
Flour, warm water and yeast are mixed, the yeast makes gas, the dough rises.
5
Ask an adult how your family keeps food safe at home. Write two things they say.
Answers differ: for example food is kept covered and the fridge is used for milk.