Experiments with Water

Ayesha put a puffed puri in a bowl of water. Would it sink or float?

You put a steel plate on water. Would it sink or float? What would happen to a spoon?

Would the cap of a plastic bottle sink or float on water?

Have you seen that something floats on water while others sink?

Find out from the other groups which things floated and which sank in the water?

After doing the experiment, fill in the blanks.

1. The iron nail ______ in water but the katori ______. I think this happened because _________________________________
2. The empty plastic bottle ______ on water. The bottle filled with water ______ because ______________________________
3. The aluminium foil ______ when it was spread out. When pressed tightly into a ball it __________. This may have happened because ____________________________________.

Mark [✓] for the things that float. Mark [✕] for those that sink.

Take some water in a glass. Put a lemon in it. Now keep putting salt in the water, half-a-spoon at a time. Were you able to float your lemon in water?

What do you think, the lemon floated in salty water, because