Page 32 - Viva ICSE Science 4 : E-book

2. The twelve fl at and broad teeth with ridges, used to grind and chew the food
are called ____________.

(a) incisors (b) premolars

(c) canines (d) molars

3. The soft centre of a tooth is called ____________.

(a) gum (b) dentine

(c) pulp (d) root

4. Enamel can be protected from decay by using a good toothpaste containing

____________.

(a) calcium (b) fl uoride

(c) phosphorus (d) nitrogen

5. To keep our teeth and gums healthy we should eat ____________.

(a) dinner (b) breakfast

(c) lunch (d) balanced diet

6. For our dental check-up we go to a ____________.

(a) vet (b) dentist
(c) teacher (d) dietitian

C. Write (T) for true and (F) for false statements.

1. There are four types of permanent teeth.

2. Temporary teeth do not fall off easily.

3. Enamel is the hardest substance.

4. Children have 22 temporary teeth.

5. Soft drinks and sugary food damage the teeth.

6. Regular dental check-ups are very important.

D. Give one word/a few words answer for the following.

1. The hard, white and shiny part of a tooth ___________

2. The fl at teeth with sharp edges, at the front of the mouth ___________

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