Page 68 - SCERT Kerala State Syllabus 8th Standard Basic Science Textbooks English Medium Part 1_Neat

b) Which property of matter is revealed by this
experiment?
2. Electronic balances are very popular now. On an electronic
balance, find the weight of an empty balloon. Again, find
its weight after filling air. Now, can you find the weight of
the air in the balloon?

Repeat the experiment using balloons of different size by
filling them with varying quantity of air.
3. Take water mixed with chalk powder in a bottle. Tie a string
to the bottle and swirl it at high speed along a circular path.
Observe after sometime.
Repeat the activity using other mixtures which are
suspensions. To which method of separation of components
of a mixture can this be connected? Are there instances
where this principle is made use of. Prepare a note.

4. Take a long white chalk piece and put a mark with black
ink slightly above the bottom. Keep the chalk piece dipped
perpendicularly in water in a watch glass. After some time
observe the changes. Repeat the experiment using different
chalk pieces marked with sketch pens of different colours.
To which of the methods of seperation you have studied is
this related?

Basic Science VIII
Basic Science VIII 67 67