6th Grade · Science · Quiz · shared by Luke Morgan
Free 6th Grade Science quiz on the Oral Microbiome. Assess student understanding of mouth bacteria, plaque, and dental health concepts.
Multiple Choice
1. _____ What is the name of the sticky, clear layer of film formed by bacteria in the mouth?
A. Acid
B. Plaque
C. Salivarius
D. Enamel
2. _____ Which specific bacterium is described as the main villain of dental health?
A. Streptococcus salivarius
B. Microscopic plaque
C. Streptococcus mutans
D. Soft tissue bacteria
3. _____ According to the passage, what does Streptococcus mutans produce after eating sugar?
A. A strong acid
B. Sticky film
C. Helpful nutrients
D. Protective layers
4. _____ Where is Streptococcus salivarius naturally found in high numbers?
A. On the hard outer layer of teeth
B. Inside the sticky plaque film
C. On the tongue and cheek tissues
D. Inside the holes of cavities
5. _____ How does Streptococcus salivarius help protect the mouth?
A. By producing acid to kill other bacteria
B. By eating the sugar before other bacteria can
C. By taking up space and resources bad bacteria need
D. By creating a permanent layer over the teeth
6. _____ What term does the author use to describe the process where one organism stops another from growing?
A. Interference
B. Colonies
C. Microbiome
D. Decay
7. _____ What happens when harmful bacteria grow too large in number?
A. The mouth becomes cleaner
B. They can cause problems and dental damage
C. The helpful bacteria grow even faster
D. They stop eating sugar
8. _____ Which habit is mentioned as a way to remove the sticky film and keep bacteria in check?
A. Eating more sweet snacks
B. Strengthening the acid attack
C. Brushing and flossing
D. Increasing sugar fuel
9. _____ What do both types of bacteria mentioned in the text need to grow and create new colonies?
A. Sugar and acid
B. A place to live and nutrients
C. Holes and cavities
D. Plaque and tooth decay