Some bacteria can be beneficial because they produce _____. 

• water
• energy
• fruit
• cheese

Describe the important function that  microorganisms have in an ecosystem. 

• They produce food from sunlight.
• They help to clean the air.
• They reduce the number of large animals.
• They decompose dead organisms.

How can mold be helpful? 

• It can be used to make medicine.
• It grows on bread and other food.
• It is a kind of fungus.
• It helps dead plants decay. 

Which statement is NOT true?

• Microorganisms help dead things decay.

• Microorganisms only live in soil.

• Microorganisms cause disease.

• Microorganisms are used to make cheese.

Which of these microorganisms is considered harmful? 

• Bacteria in yogurt
• Fungus in antibiotics
• Yeast in bread
• Mold on fruit

Which of the following is a benefit of microorganisms? 

• They are used to make medicine.
• They do not multiply.
• They feed on living things.
• They remove minerals from the soil.

One benefit of bacteria is that they can be used to _____. 

• Keep our clothes from wearing out.
• Produce plastic from petroleum.
• Produce certain kinds of foods.
• Strengthen some wood products.

How can you protect yourself from harmful bacteria?

• Keep food in the refrigerator.

• Wash your hands often.

• Make sure foods are thoroughly cooked.

• All the answer choices.

Which single-celled microorganism is helpful in making foods like yogurt and pickles?

• Bacteria
• Fungus
• Virus
• Parasite

Identify which statement is false.

• Microorganisms cure diseases.

• Microorganisms are rare.

• Some microorganisms are eaten.

• Microorganisms cause diseases.