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V. Answer the following questions in three to six sentences.

1. Describe the tongue.

2. Write about the temporary and permanent teeth.

3. Name the four types of teeth and write their functions.

4. What is tooth decay? How should we take care of our teeth?

5. List the uses of microbes.

Let’s Communicate

Answer the following questions. Ask these questions to your friends too.

1. How many milk teeth have you lost till now?

2. How did you feel after losing your first milk tooth?

3. How did you feel after getting a new tooth?

H TS Critical Thinking

What happens if there are no teeth in our mouth? How would you look without
teeth?

Know More

Braces are dental instruments that help correct tooth
defects such as crowded teeth, crooked teeth, gapped

teeth or misaligned teeth. Many people wear braces
as teenagers, but adults often wear them too. Braces
gradually straighten and align your teeth as you wear

them, eventually correcting your bite.

Let’s Know Experiential Learning

Make a list of edible microbes and the source from which we get these

microbes.

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