Advertisements
Advertisements
Question
Have you seen that something floats on water while others sink?
Advertisements
Solution
Yes, I have observed that certain things float on water while others sink. Everything displaces water equal to its volume. If the displaced water is more than the weight of a thing, then the thing floats, otherwise, it sinks in water.
APPEARS IN
RELATED QUESTIONS
You put a steel plate on water. Would it sink or float? What would happen to a spoon?
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 ______
Make groups of four friends. For the experiment, you will need 4-5 glasses or bowls, spoons, water, and the things listed in the table. Take some water in each glass. Now try to dissolve one thing in one glass. Observe what happens and note it in the table.
| Things | Did it dissolve or not? | What happened after keeping for 2 minutes? |
| 1. Salt | ______ | ______ |
| 2. Soil | ______ | ______ |
| 3. Chalk powder | ______ | ______ |
| 4. 1 spoon milk | ______ | ______ |
| 5. Oil | ______ | ______ |
Could you see the salt after it dissolved in water? If no, why?
What difference did you see - in the water with salt, and
the water with chalk powder - after keeping for some time?
Do you think the oil got dissolved in the water? Why do you think so?
You have washed your handkerchief and you want to dry it quickly. What all can you do?
You have been given some mishri pieces (lumps of sugar). Suggest some ways to dissolve them quickly.
Find out from the other groups which things floated and which sank in the water?
After doing the experiment, fill in the blanks.
The empty plastic bottle ______ on water. The bottle filled with water ______ because ______
