Page 65 - Science class 4

Hang a paper clip on a piece of thread and suspend it in the glass. Make sure that the

paper clip doesn't touch the bottom. Leave the cup where it won't be disturbed and

cover it to keep dust out.

After a few days, crystals will begin to form around the paper clip and thread.
Use a magnifying glass to examine the shape of crystals.

Practical Approach

Take a pencil and an eraser. Touch and feel each object. What do they feel like?

Put each of the two items in different glasses. Do you see any change in their

shape or size?