The Cloth Merchant's Lens: teacher key

Germs, grade 7 edition, written for 7th grade. Germs are too small to see without a microscope, yet they shape our health. Learn what germs are, how they make you sick, and how your body and a bar of soap fight back.

Read the book. Print this page for the key.

Questions and answers

1. What was Leeuwenhoek's job?
   • He sold cloth (answer)
   • He taught at a university
   • He was a doctor
2. What do toxins from some bacteria do?
   • Help digestion
   • Damage cells (answer)
   • Make fevers lower
3. Why might a fever be a good sign?
   • It means germs are gone
   • It means you are not sick
   • It helps the immune system act against germs (answer)
4. Why would antibiotics not help a cold?
   • Colds are caused by viruses (answer)
   • Colds go away too fast
   • Colds are caused by fungi
5. In this passage, what does a barrier do?
   • Carries germs in
   • Blocks things from getting in (answer)
   • Makes white blood cells

Words

• microscope: viewing tool
• bacteria: tiny living things
• virus: tiny germ
• parasites: living freeloaders
• antibodies: germ fighters
• toxins: poisons