Page 57 - Science class 4

Take three parts of baking soda and one part of salt by

volume and mix them thoroughly in a bowl. Transfer the
mixture into a short small-mouthed bottle using a funnel.

Add a few drops of peppermint oil.

Your tooth powder is ready to use. Taste it and you will

find that the tooth powder has a satisfying, different taste

and leaves your mouth feeling very fresh and soothed.

Lab Activity

Check your teeth by opening your mouth wide, in front
of a mirror.

how many of your teeth :
(i) have cavities, and

(ii) are yellow in colour?

LEARNING BY PLAYING

1. Colour these teeth according to the direction given below :

Incissors – green Molar – blue

Canine – purple Wisdom – orange
Premolar – pink

2. Tick ( ) what to take for keeping teeth healthy :ü

3. List down the five food items that would destroy your teeth ?

1. ______________________

2. ______________________

3. ______________________
4. ______________________

5. ______________________