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प्रश्न
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 | ______ | ______ |
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उत्तर
| Things | Did it dissolve or not? | What happened after keeping for 2 minutes? |
| 1. Salt | Yes | Salt and water got to be mixed together completely. Water remained transparent |
| 2. Soil | No | Soil settled down at the bottom. Water became muddy. |
| 3. Chalk powder | No | Chalk powder settled down at the bottom. Water became whitish. |
| 4. 1 spoon milk | Yes | Milk and water got mixed together completely. Water became whitish. |
| 5. Oil | Yes | Oil floats on the surface of the water. |
APPEARS IN
संबंधित प्रश्न
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.
The iron nail ______ in water but the katori ______. I think this happened because ______
Do this experiment in groups of four friends. Each group will need a big pot filled with water and the things listed on the table. Put each thing one by one in water and observe. Write your observations in the table given below.
Mark [✓] for the things that float. Mark [×] for those that sink.
| Things to be put in water | I guessed before I did it | I saw when I did it |
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| Iron nail or pin | ||
| Matchstick | ||
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Aluminum foil (from medicine packing)
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| A piece of ice |
What do you think, the lemon floated in salty water, because ______
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?
One day Ayesha’s mother put some water to boil on the stove for making tea. She got busy with something and forgot about it. When she remembered and came to check, she found very little water left in the pan.
Think where did the water go?
One day Ayesha’s mother put some water to boil on the stove for making tea. She got busy with something and forgot about it. When she remembered and came to check, she found very little water left in the pan.
At your house, what things are made by drying in the sun?
