oly class-4 evs set-7 – The Smart Visions

Created on September 17, 2024

OLYMPIAD Class -4 Science ( Teeth and Microbes )

NameEmailPhone NumberSelect Level / Class

1 / 24

What is the primary cause of enamel erosion ?

A) Lack of saliva production

B) Not brushing teeth regularly

C) Plaque buildup on teeth

D) Consuming acidic foods and drinks

2 / 24

What is the sticky film of bacteria that forms on teeth called ?

A) Plaque

B) Tartar

C) Enamel

D) Cavity

3 / 24

What is the main function of the gums in the mouth ?

A) Protecting the tongue

B) Chewing food

C) Holding the teeth in place

D) Producing saliva

4 / 24

What is the substance secreted by the salivary gland that helps break down carbohydrates in the mouth ?

A) Pulp

B) Saliva

C) Enamel

D) Plaque

5 / 24

What is the purpose of brushing teeth regularly ?

A) To prevent cavities

B) To remove plaque and food particles

C) All of the above

D) To strengthen tooth enamel

6 / 24

Which type of tooth is used for cutting and slicing food ?

A) Molars

B) Incisors

C) Canines

D) Premolars

7 / 24

Which type of tooth is responsible for tearing food ?

A) Incisors

B) Canines

C) Molar

D) Premolar

8 / 24

What is the purpose of dental sealants ?

A) To remove plaque from teeth

B) To prevent tooth decay

C) To fill cavities

D) To align crooked teeth

9 / 24

What is the purpose of using mouthwash ?

A) To strengthen tooth enamel

B) To kill bacteria in the mouth

C) To remove plaque from teeth

D) To align crooked teeth

10 / 24

What is the main cause of plaque formation on teeth ?

A) Not flossing regularly

B) Consuming sugary foods and drinks

C) Brushing teeth too vigorously

D) Lack of saliva production

11 / 24

What is the main cause of bed breath ( halitosis ) ?

A) Consumption of garlic and onions

B) Lack of saliva production

C) Gum disease

D) Accumulation of bacteria in the mouth

12 / 24

Which type of microorganism contributes to the formation of dental plaque ?

A) Viruses

B) Fungi

C) Bacteria

D) Protozoa

13 / 24

Which type of tooth is commonly referred to as " eye teeth" ?

A) Canines

B) Incisors

C) Molar

D) Premolar

14 / 24

Which of the following is a symptom of teeth decay ?

A) Sensitivity to hot or cold foods

B) All of the above

C) Toothache

D) Bed breath

15 / 24

What is the role of fluoride in dental health ?

A) It kills bacteria in the mouth

B) It promotes tooth decay

C) It strengthens tooth enamel

D) It reduces saliva production

16 / 24

What is the outermost layer of the tooth called ?

A) Dentin

B) Enamel

C) Cementum

D) Pulp

17 / 24

What is the purpose of the roots of teeth ?

A) To produce saliva

B) To chew food

C) To protect teeth from decay

D) To anchor teeth in jawbone

18 / 24

Which part of the tooth contains nerves and blood vessels ?

A) Dentin

B) Crown

C) Enamel

D) Root

19 / 24

Which of the following is a symptom of gum disease ?

A) All of the above

B) Receding gum

C) Bleeding gum

D) Loose teeth

20 / 24

What is the purpose of flossing teeth ?

A) To strengthen tooth enamel

B) To prevent gum disease

C) Both a and c

D) To remove food particles between teeth

21 / 24

What is the role of fluoride in dental health ?

A) It strengthens tooth enamel

B) It reduces saliva production

C) It promotes tooth decay

D) It kills bacteria in the mouth

22 / 24

Which part of the tooth is responsible for anchoring it in the jawbone ?

A) Crown

B) Enamel

C) Dentin

D) Root

23 / 24

What are the hard , white structures found in the mouth used for chewing food called ?

A) Lips

B) Tongue

C) Teeth

D) Gums

24 / 24

Which of the following is NOT a function of saliva in the mouth ?

A) Anchoring teeth in the jowbone

B) Protecting teeth from decay

C) Lubrication food for swallowing

D) Breaking down carbohydrates

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