Page 33 - Viva ICSE Science 4 : E-book

3. The number of molars in each jaw of an adult ___________

4. The soft tissue that surrounds the base of a tooth ___________

5. The hard yellow substance that lies under the enamel ___________

6. The part of the tooth that is inside the gums ___________

E. Answer the following questions.

1. What are temporary and permanent teeth?

2. Explain the structure of a tooth with the help of a labelled diagram.

3. Write the number and function of each of the following kinds of teeth.

(a) Molars (b) Incisors (c) Canines

4. Explain how tooth can decay.

5. Mention the type of food you should take and food you should avoid, to
maintain a healthy set of teeth.

6. Mention few other ways to protect teeth from decaying.

THINK AND ANSWER

1. Find out at what age do adults start losing their permanent teeth.
2. How many teeth does a newborn baby has?

TALK ABOUT

1. How is teeth decay caused? How can it be prevented?

2. Our parents always advice us not to eat too many sweets and chocolates, and we often ignore
them. Discuss in class why do they advice us so.

LINK AND LEARN

Make a model of an adult's jaws. Use white clay to design the set of teeth. For designs refer to the
images given in the chapter. Now use a pink sheet to make jaws. Using a glue or a double-sided tap
stick the set of teeth to the jaws.

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