Bacteria and Viruses

Which type of cell fights off harmful bacteria?

• white blood cell
• red blood cell
• skin cell
• nerve cell

Which system in our bodies fights infections?

• the digestive system
• the immune system
• the cardiovascular system
• all of the above

By itself, a virus is

• a living animal
• a type of plant
• lifeless
• a harmful infection

The viruses that cause colds usually attack the cells in the

• stomach and intestines
• nose and throat
• brain
• legs and feet

You are more likely to catch a cold if you

• eat food that is not properly cooked
• go out on a cold day without a jacket
• stand in an elevator with a sneezing stranger
• swim in a cold lake

Where do bacteria live?

• only in water
• only inside living organisms
• only in the soil
• almost everywhere

What would you need to see a virus?

• Just your own eyes
• a telescope
• a very strong microscope
• 3-D glasses

What can a person do or not to avoid the flu?

• Sit in mud

• Eat Healthy

• Wash Your Hands

• Get Sneezed On

A BACTERIA IS SMALLER THAN A VIRUS

• TRUE

• FALSE