A solid is put in a bucket of water. It floats just below the surface of the water. What do you think is the density of the object with relation to the density of water? Open Answer »
Differentiate among opaque, translucent and transparent materials, giving one example of each. Open Answer »
Chalk, iron nail, wood, aluminium, candle, cotton usually look different from each other. Give some properties by which we can prove that these materials are different. Open Answer »
Why do you think oxygen dissolved in water is important for the survival of aquatic animals and plants? Open Answer »
Sugar, salt, mustard oil, sand, sawdust, honey, chalk powder, petals of flower, soil, copper sulphate crystals, glucose, wheat flour are some substances given to Paheli. She wants to know whether these substances are soluble in water or not. Help her in identifying soluble and insoluble substances in water. Open Answer »
