Microorganisms

Bacteria does NOT come from:

• unclean water

• touching unclean surfaces

• sterile objects

• other bacteria

When we don't properly cook meats, or don't wash fruits and vegetables properly, we are doing which of the following?

• Causing Salmonella which can make humans sick

• Creating E.Coli that is harmful for humans to consume

• Spreading helpful microbes

• Creating microbes that are beneficial for humans to consume

Would it be good for your health to kill all of the bacteria in your body?

• Yes. Getting rid of all bacteria in the body would prevent most diseases. This is why doctors use antibiotics.

• Yes. Most bacteria in your body are harmful. Killing all of the bacteria would get rid of these bacteria.

• No. The harmful bacteria in your body are important for stimulating the immune system.

• No. Many bacteria in your body are beneficial. These beneficial bacteria help your body perform physiological functions, such as digestion.

When we forget to wash our hands, or don't wash them properly, we are doing which of the following?

• Spreading harmful microbes to other people

• Not washing our hands will not spread disease or germs to other people

• Spreading beneficial microbes to ourselves by touching our eyes, mouths, noses or open cuts on our bodies

• Spreading harmful microbes to ourselves by touching our eyes, mouths, noses, or open cuts on our bodies

(DOK: 3) After a person takes an antibiotic to fight a bacterial infection in the body, some doctors recommend taking a pill called a probiotic every day. The list shows some facts about probiotics. Facts about Probiotics • They are made of living microorganisms. • They improve food digestion and absorption of nutrients. • They increase the body’s ability to fight infections. • They increase the number and types of normal bacteria in the gut. Which argument BEST supports the claim that humans benefit from taking probiotics?

• Humans benefit from probiotics because probiotics cause people to become sick.

• Humans do not benefit from probiotics because probiotics are made of living microorganisms.

• Humans benefit from probiotics because probiotics can be taken every day after having an infection.

• Humans benefit from probiotics because probiotics balance the number and types of bacteria that live in the gut.

Which of the following is a benefit of microorganisms?

• They do not multiply.

• They are used to make medicine.

• They feed on living things.

• They remove minerals from the soil.

Lyle's brother and sister have a fever and a sore throat. A few days later, Lyle also gets a fever and a sore throat. It is likely that Lyle's illness

• cannot be spread to another person

• was caused by microorganisms in his body being killed

• was caused by microorganisms entering his body

• will go away if he washes his hands

Streptococcus is a kind of bacteria that can be found on surfaces, such as tabletops and doorknobs, that have made contact with an infected individual's nasal secretions. Salmonella is a kind of bacteria that can be found in food, where it can cause food poisoning. Fungi can live in many different environments, including locker rooms, where they can cause athlete's foot or ringworm. Based on this information, it is possible to conclude that

• disease-causing organisms are more likely to be present in food than anywhere else.

• humans should avoid receiving vaccinations to prevent disease

• there are no substances available that can kill disease-causing organisms

• humans are constantly interacting with other organisms that can cause disease.

Tags

NGSS.MS-LS2-2

Some microorganisms found in soil can be beneficial. What is one way that they are helpful?

• They kill weeds

• They help plants with photosynthesis.

• They break down dead matter

• They provide plants with oxygen

Tags

NGSS.MS-LS2-3

Which of these foods is produced using bacteria?

• fresh apples

• mashed potatoes

• cheddar cheese

• fried chicken