Worksheet on Teeth and their structure - Class 4 Notes & Olympiad Questions

Solved Questions on Teeth and their Structure

1. Name and label the hardest part of the teeth in the picture below.

a) B: Enamel
b) C: Root
c) A: Enamel
d) B: Dentin

Answer: c) Enamel is the hardest outer layer of the tooth that protects it from decay. It is the visible white part of the tooth and provides a strong protective covering.

2. Identify the type of teeth shown in the picture. It helps us bite into our food.

a) Incisors
b) Canines
c) Premolars
d) Molars

Answer: a) The picture shows incisors, which are the type of teeth that help us bite into our food.

3. What should you limit in your diet to prevent tooth decay?

a)
b)
c)
d)

Answer: b) Sugary foods can contribute to the growth of bacteria in the mouth, which produces acids that can damage the teeth and lead to decay.

4. Match the following teeth with their correct function.

a) 1:C, 2:A, 3:B
b) 1:A, 2:C, 3:B
c) 1:C, 2:B, 3:A
d) 1:B, 2:C, 3:A

Answer: d) Molars: 12 in number, helps us crush and grind our food.
Canines: 4 in number, help us tear our food.
Premolars: 8 in number, help us crush and grind our food.

5. Ollie's brother is approximately 5 years and 11 months old. What is the probable dental change occurring at this age?

a) The brother is developing permanent molars.
b) The brother is experiencing tooth decay.
c) The brother is getting his first set of baby teeth.
d) The brother is losing his baby teeth to allow space for permanent teeth.

Answer: d) At around 6 years of age, children often start to lose their baby teeth as part of the natural tooth development process. The baby/temporary teeth begin to loosen and fall out to make way for permanent teeth.

FAQs on Teeth and their Structure

1. What are temporary teeth?

Temporary teeth, often known as baby teeth, are the initial set of teeth that children grow. These teeth begin to appear at the age of six months, gradually replacing the gums' initial emptiness with a set of bright whites.

2. What is the outermost layer of a tooth called, and why is it important?

The outermost layer of a tooth is called enamel. It is important because it shields the tooth from decay and keeps it strong and healthy.

3. Can eating certain foods keep our teeth healthy?

Yes, eating a balanced diet with calcium-rich foods, such as dairy products and leafy greens, helps keep our teeth strong and healthy.

4. Are baby teeth important, and why should we take care of them?

Yes, infant teeth are necessary. They help in eating and learning to speak, as well as ensuring the right placement of permanent teeth. Caring for them lays the groundwork for a lifetime of good dental health.

5. What are wisdom teeth?

Wisdom teeth, also known as third molars, normally develop in the late teens or early twenties. These teeth were more important in our forefathers' diets.