There are five types of germs: ____, viruses, algae, fungi, and protozoa. Germs are so small that we cannot ____ them. To look at germs, we use a ____. ____ means to find out more about something using research or experiments. Not all germs are ____ for us. Some can be helpful to build up our immune system and help us break down food.

Leaderboard

Estilo ng visual

Mga pagpipilian

Magpalit ng template

Ibalik ng awtomatikong pag-save: ?