Page 63 - ACTIVE SCIENCE 4 TOC

Practice Time

A. Tick the correct option.

1. The part of the tooth inside the gum is called _____________.
a. root b. crown

c. enamel d. pulp
2. They help in cutting and biting and are placed in front of the jaw.

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

3. There are _____________ sets of teeth in humans.
a. four b. two

c. three d. one
4. The milk teeth fall off by the age of _____________.

a. four b. six
c. seven d. thirteen

5. _____________ is one of the organs of the digestive system.
a. Liver b. Pancreas
c. Large intestine d. All the above

6. Our mouth is connected to our stomach through the _____________.

a. intestine b. food pipe
c. liver d. none of the above
7. _____________ are very tiny living beings.

a. Microbes b. Teeth

c. Rats d. None of these

B. Fill in the blanks.
1. ______________ is the upper part of the tooth, above the gum, which is visible.

2. The first set of the teeth is called ______________.
3. Breaking down of food into small particles so that it can be easily absorbed by the
body is called ______________.

4. Malaria is caused by ______________.
5. Ringworms are caused by ______________.

6. Disease causing microbes are called ______________.
7. The part of the tooth that has blood vessels and nerves is called ______________.

8. It is the hardest outer part of the teeth is called ______________.
9. Visit a ______________ regularly to know how healthy your teeth are.

10. The undigested food enters the ______________.

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