How does sanitizer kill germs?

What invention helped scientists learn about germs long ago?

• tweezers

• thermometer

• microscope

Who was Antoine Van Leeuwenhoek?

• the inventor of the microscope

• the author of a book

• a teacher

• a bus driver

What did the scientists look at under the microscope for the first time?

• cookie crumbs

• pond water

• dust

• sweat

What did the scientists call the germs, when they saw them for the first time?

• little animals

• zebras

• canoes

• water

True or False? Scientists learned that "little animals" were actually germs?

• True

• False

True or False? There are many types of germs.

• True

• False

Click all of the types of germs below. There is more than one answer.

• viruses

• bacteria

• amoeba

• pickles

True or False? Sanitizer uses alcohol to dry out the germs on your hands.

• True

• False

True or False? Dried out germs will die.

• True

• False

Click all the answers that make this statement true.

Hand soap is works better than sanitizer because hand soap....

• kills germs

• cleans dirt

• doesn't dry out the skin as bad

• tastes good