What difference did you see in water with salt and water with chalk powder after keeping for sometime?
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You are provided with a fine white coloured powder which is either sugar or salt. How would you identify it without tasting?
On heating the powder, it will char if it is a sugar. Alternatively, the powder may be dissolved in water and checked for its conduction of electricity. If it conducts,...
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Suppose you are in a dark room. Can you see objects in the room? Can you see objects outside the room? Explain.
We can see any object, when light reflected by that object reaches our eyes. But in the dark room, no light is reflected by the object so we are unable...
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Why does it take sometime to see objects in a dim room when you enter the room from bright sunlight outside?
In the bright sunlight, iris causes the pupil to become smaller so that only a small portion of light enters the eye and rods of the retina are also adjusted...
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Sugar, salt, mustard oil, sand, sawdust, honey, chalk powder, petals of flower, soil, copper sulphate crystals,
Soluble in water – Sugar, Salt, Honey, Copper sulphate crystals, Glucose Insoluble in water – Mustard oil, Sand, Sawdust, Chalk powder, Soil, Petals of flower, Wheat flour
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If you dump kitchen waste in a pit, it may, after sometime.
(a) convert into compost.
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In which bowl did the seeds sprout? What difference did you see between this bowl and other bowls?
Seeds sprouted in bowl 2 only. In bowl 2, the seeds got both air and water and thus, there sprouted whereas in bowl 1, these got only water but no...
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Could you see the salt after it dissolved in water? If no, why?
No, because salt got dissolved completely into the water.
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Which of the two would you be able to separate from the water by straining with a cloth-salt or chalk powder?
We can separate chalk powder by straining with a cloth.
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Have you ever gone to see an old monument? Which was that? Did you feel it told you a story? What could you know about these time form it?
Yes, once I went to Agra to see Taj Mahal. I felt as if it was telling the story of its time. We could know about the culture, art, sculptures...
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See how the earth is looking. Can you see the surface of the moon? Do you have some questions after looking at this picture?
The earth is looking spherical in shape. Yes, I can see the surface of the moon. The following questions arise in my mind after looking at this picture: (i) Who look...
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