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) Plaque buildup on teeth

B) Consuming acidic foods and drinks

C) Not brushing teeth regularly

D) Lack of saliva production

2 / 24

Which of the following is a symptom of gum disease ?

A) Loose teeth

B) Receding gum

C) All of the above

D) Bleeding gum

3 / 24

What is the purpose of dental sealants ?

A) To align crooked teeth

B) To prevent tooth decay

C) To fill cavities

D) To remove plaque from teeth

4 / 24

What is the purpose of the roots of teeth ?

A) To chew food

B) To produce saliva

C) To protect teeth from decay

D) To anchor teeth in jawbone

5 / 24

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

A) Incisors

B) Molar

C) Premolar

D) Canines

6 / 24

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

A) Accumulation of bacteria in the mouth

B) Lack of saliva production

C) Consumption of garlic and onions

D) Gum disease

7 / 24

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

A) Lubrication food for swallowing

B) Breaking down carbohydrates

C) Protecting teeth from decay

D) Anchoring teeth in the jowbone

8 / 24

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

A) Tartar

B) Plaque

C) Cavity

D) Enamel

9 / 24

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

A) Enamel

B) Root

C) Dentin

D) Crown

10 / 24

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

A) Premolars

B) Canines

C) Incisors

D) Molars

11 / 24

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

A) Bacteria

B) Fungi

C) Protozoa

D) Viruses

12 / 24

Which of the following is a symptom of teeth decay ?

A) Toothache

B) Sensitivity to hot or cold foods

C) Bed breath

D) All of the above

13 / 24

What is the role of fluoride in dental health ?

A) It promotes tooth decay

B) It strengthens tooth enamel

C) It kills bacteria in the mouth

D) It reduces saliva production

14 / 24

What is the purpose of brushing teeth regularly ?

A) To strengthen tooth enamel

B) To prevent cavities

C) To remove plaque and food particles

D) All of the above

15 / 24

What is the outermost layer of the tooth called ?

A) Dentin

B) Pulp

C) Cementum

D) Enamel

16 / 24

What is the role of fluoride in dental health ?

A) It promotes tooth decay

B) It kills bacteria in the mouth

C) It strengthens tooth enamel

D) It reduces saliva production

17 / 24

What is the main cause of plaque formation on teeth ?

A) Brushing teeth too vigorously

B) Lack of saliva production

C) Not flossing regularly

D) Consuming sugary foods and drinks

18 / 24

Which type of tooth is responsible for tearing food ?

A) Molar

B) Canines

C) Premolar

D) Incisors

19 / 24

What is the purpose of flossing teeth ?

A) To remove food particles between teeth

B) Both a and c

C) To strengthen tooth enamel

D) To prevent gum disease

20 / 24

Which part of the tooth contains nerves and blood vessels ?

A) Dentin

B) Root

C) Crown

D) Enamel

21 / 24

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

A) Enamel

B) Saliva

C) Pulp

D) Plaque

22 / 24

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

A) Lips

B) Tongue

C) Teeth

D) Gums

23 / 24

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

A) Protecting the tongue

B) Holding the teeth in place

C) Producing saliva

D) Chewing food

24 / 24

What is the purpose of using mouthwash ?

A) To remove plaque from teeth

B) To kill bacteria in the mouth

C) To strengthen tooth enamel

D) To align crooked teeth

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