Microorganisms

Most microorganisms cannot be seen without a...

• microscope
• magnifying lens
• telescope
• x-ray machine

Compared to a blood cell, viruses are...

• smaller
• larger
• faster
• slower

Which is a true statement?

• All microorganisms are harmful.
• All microorganisms are beneficial.
• Some microorganisms are harmful while others are beneficial.
• Microorganisms are beneficial only to humans.

Yeast is used to make...

• rolls
• cakes
• pizza crust
• all of the above

In the 1670s, Leeuwenhoek discovered microorganisms in the human mouth which caused tooth decay.
Which is another way that microorganisms can be harmful?

• Microorganisms act on milk to make yogurt.
• Microorganisms break down dead organisms.
• Microorganisms break down tissues in fruits and vegetables.
• Microorganisms can be used to make medicines.

What is the cause of the common cold?

• bacteria
• cold temperatures
• sneezing and coughing
• viruses

What is a way that you can protect yourself from microorganisms that can live on food?

• Store uncooked meats in a refrigerator or freezer. 
• Wash hands with soap and water before and after handling food.
• Cook chicken and other raw meats thoroughly.
• All of the above

Which best describes where you would find microorganisms?

• in ponds, lakes, and oceans.
• in animals, plants, and humans.
• on food that has rotted.
• everywhere around us.

How can a bad microorganism such as Chicken Pox be used for good?

• It can't.

• It can help clean out your stomach.

• It can help with developing a vaccine by using small amounts of the virus for injections.

• It can be used to make yogurt and toothpaste.

Which of the following is true about microorganisms? Check all that apply.

• They feed and grow.

• They reproduce.

• They grow best in warm, moist environments.

• They are ALL harmful.

• They are only found in warm, tropical environments.