Grade 9 · Science · Unit 11 of 17
Infectious Disease
Germs, vaccines, antibiotics and how diseases change.
What your child practises
Practises pathogens, vaccines, antibiotics and antibiotic resistance, mutations and strains, waning immunity, and public health measures that limit the spread of disease.
Manitoba Curriculum learning outcome: SCI.9.E.22 · adaptation in infectious diseases and related public health measures
Sample questions
A taste of this unit. In the app, questions change every time and get easier or harder to match your child.
Question 1
A vaccine works by…
- preparing the body's immune system to recognize a pathogen
- making the body warmer
- killing all germs in the air
preparing the body's immune system to recognize a pathogen
Hint: The immune system learns to respond quickly.
Question 2
A booster dose is given to…
- treat a sprained ankle
- cure a bacterial infection
- increase protection that has faded
increase protection that has faded
Hint: It reminds the immune system.
Question 3
Mutations in a virus can lead to…
- new strains
- a vaccine becoming a bacterium
- fewer genes
new strains
Hint: A mutation is a change in genetic material.
Question 4
Waning immunity means…
- protection from a vaccine or past infection fades over time
- immunity is always permanent
- germs get stronger every year
protection from a vaccine or past infection fades over time
Hint: Booster shots can restore protection.
Question 5
Antibiotics are used to treat infections caused by…
- bacteria
- stress
- viruses
bacteria
Hint: Antibiotics do not work against viruses, such as the ones that cause colds and flu.
Question 6
An antibiotic kills most bacteria in an infection, but a few survive. What will the next generation of bacteria contain?
- more of the resistant bacteria
- only weak bacteria
- no bacteria
more of the resistant bacteria
Hint: The survivors reproduce.