Bacteria
What is a bacteria?
a. A type of virus
b. A type of medicine
C. A Microorganism.
C. A Microorganism.
Can bacteria have a helpful relationship with humans?
A. Yes
B. No
C. Only bacteria found in food
A. Yes
What is a microbiome?
A. A medicine that kills bacteria
B. A community of microorganisms living in a particular environment
C. A single type of bacteria
B. A community of microorganisms living in a particular environment
What are antibiotics used to treat?
A. Bacterial infections
B. Viral infections
C. Microorganisms
A. Bacterial infections
In a scientific argument, what is a claim?
A. A statement that answers a scientific question
B. A random guess
A. A statement that answers a scientific question
True or False: ALL bacteria are harmful to humans
False
Bacteria help turn milk into yogurt. Is this relationship helpful, harmful, or neutral to humans?
A. Helpful
B. Harmful
C. Neutral
A. Helpful
Where can you find a human microbiome?
A. Only in the stomach
B. Only on the skin
C. Places such as the gut, skin, and mouth
C. Places such as the gut, skin, and mouth
True or False: Antibiotics kill viruses such as the viruses that cause colds.
FALSE
What is evidence?
A. An opinion
B. Data or observations that support or challenge a claim
C. A prediction about the future
B. Data or observations that support or challenge a claim
Name one place where bacteria can live in or on the human body.
skin, stomach, hair,
Some bacteria live on human skin without causing noticeable harm or providing an obvious benefit. What type of relationship is this?
A. Helpful
B. Neutral
C. Harmful
B. Neutral
Why might scientists describe the gut as an ecosystem?
A. It contains organisms that interact with one another and their environment
B. It contains no microorganisms
A. It contains organisms that interact with one another and their environment
Why might a doctor prescribe an antibiotic for a bacterial infection?
A. Antibiotics can kill bacteria or stop them from reproducing
B. Antibiotics turn bacteria into viruses
A. Antibiotics can kill bacteria or stop them from reproducing
What does reasoning explain?
A. Why and how the evidence supports the claim
B. What the scientist's favorite answer is
C. How to collect more data
A. Why and how the evidence supports the claim
A bacterium gets nutrients from its surroundings and uses them to grow and reproduce. What does this tell you about bacteria?
A. They are living organisms
B. They are not living
C. They are viruses
A. They are living organisms
A person gets a cut. Certain bacteria enter the wound and begin multiplying, causing an infection. Is this relationship helpful, neutral, or harmful?
A. Helpful B. Neutral C. Harmful
C. Harmful
A person's gut contains many different types of bacteria. One type helps break down food while another competes with harmful bacteria. What does this suggest about the microbiome?
A. All bacteria have the same job
B. Different microorganisms can have different roles and interact with each other
B. Different microorganisms can have different roles and interact with each other
A person stops taking an antibiotic as soon as they feel better. Why can this be a problem?
A. The body's microbiome is gone
B. Some bacteria may survive and continue reproducing
B. Some bacteria may survive and continue reproducing
A student claims, “Bacteria can be helpful to humans.” Their evidence is: “Some bacteria help make yogurt.” What should their reasoning explain?
A. How bacteria changing milk into yogurt is helpful to humans
B. Why all yogurt is very yummy
C. Why turning milk into yogurt is a bad thing
A. How bacteria changing milk into yogurt is helpful to humans
Scientists are studying something that is smaller than most bacteria. Which object would be the best choice to study?
a. A grain of sand
b. A human hair
c. An atom or molecule
d. A piece of food
C
The same type of bacteria can be helpful in one situation but harmful in another. How is this possible?
A. Bacteria change into different organisms
B. Their effect depends on where they are and how they interact with the human body
C. All bacteria are always helpful
B. Their effect depends on where they are and how they interact with the human body
A person takes antibiotics that kill many bacteria in their gut. Predict one possible change to their microbiome and explain your reasoning.
A. The microbiome may become less diverse or change in balance
B. The microbiome will disappear completely
C. Every type of bacteria will increase
A. The microbiome may become less diverse or change in balance
A bacterial population contains a few bacteria that are resistant to an antibiotic. After the antibiotic is used, most bacteria die, but the resistant bacteria survive and reproduce. What happened to the population?
A. The resistant bacteria became a larger portion of the population
B. All bacteria became resistant at the same time
A. The resistant bacteria became a larger portion of the population
A student claims, “Antibiotics can change the microbiome.” Their data show that several types of gut bacteria decreased after antibiotic treatment. Which reasoning best connects the evidence to the claim?
A. Antibiotics can reduce some bacteria, changing the types and amounts of bacteria in the microbiome
B. Antibiotics always increase every type of bacteria
C. Gut bacteria cannot be affected by antibiotics
A. Antibiotics can reduce some bacteria, changing the types and amounts of bacteria in the microbiome