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The yellowing of teeth is due to a stick...

The yellowing of teeth is due to a sticky film of saliva, food particles and bacteria, and is called

A

Opaque

B

Plaque

C

Plague

D

All

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The hard chewing surface of teeth that helps in the mastication of food is called.

If the teeth are not cleaned regularly, they become covered with a sticky yellowish laryer W of food particles and bacteria. Since layer W covers the teeth, the alkaline liquid X secreted by glands Y inside the mouth cannot reach the teeth surface to neutralise the acid formed by the action of organisms Z on sugary food, and hence tooth decays sets in (a) What is W known as ? (b) What is (i) X, and (ii) Y ? (c) What are organisms Z ? (d) State one way of removing layer W from the teeth

Break down of food by the teeth in the oral cavity is called

Mixture of food and saliva in oral cavity is called

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BETOPPERS-HEALTH AND HYGIENE-SUMMATIVE WORKSHEET
  1. The yellowing of teeth is due to a sticky film of saliva, food particl...

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  2. Classify the following habits as good or bad: Cleaning teeth after e...

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  3. Classify the following habits as good or bad: Putting finger inside ...

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  4. Classify the following habits as good or bad: Wearing clean clothes.

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  5. Classify the following habits as good or bad: Not consuming chocolat...

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  6. Classify the following habits as good or bad: Using hair dyes.

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  7. Classify the following habits as good or bad: Using fluoride toothpa...

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  8. Why do we need to undertake the following ? Keeping the cooked food ...

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  9. Why do we need to undertake the following ? Developing the habit of ...

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  10. Why do we need to undertake the following ? Not walking barefooted

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  11. Why do we need to undertake the following ? Washing and combing hair...

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  12. Why do we need to undertake the following ? Washing hands before and...

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  13. Why do we need to undertake the following ? Using sufficient light f...

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  14. Define health.

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  15. List three functions of food.

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  16. Name the major nutrients in our food.

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  17. Name the three groups of foods.

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  18. What are the two major factors responsible for the development of dise...

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  19. What is meant by a balanced diet?

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  20. Mention five characteristics of good health

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  21. What can be done to maintain good health?

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