221 Facts Tell Me Why

221 Facts Tell Me Why221 Facts Tell Me Why is a storehouse of curious facts about the world. The collection will encourage children to go and explore knowledge out there in the world.✨📚

Why do dolphins and whales swim to the surface of the ocean?

Dolphins and whales are not fish at all! They are mammals like us and need to breathe oxygen through their noses, also known as ‘blowholes’ that are located on top of their heads. They are like other mammals on land, because whales and dolphins give birth to babies instead of laying eggs. They are warm-blooded

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Why does the ice-cream mixture turn into a solid when frozen?

Ice-cream mixture is made up of three basic components at its molecular level – concentrated sweetened cream, ice crystals, fat globules and air. In its liquid form, ice-cream molecules have more energy and can vibrate more easily. But as soon as the liquid is cooled, energy is released, and the molecules move closer. Because of

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Why doesn’t soda go flat immediately after opening the can?

Soda is a carbonated drink. Carbonated drinks are sealed under high pressure, low temperatures, with carbon dioxide dissolved in each can or bottle. Without this the drink would not have its fizz. As soon as you open the can or the bottle, the pressure inside the can decreases. It immediately converts the carbon dioxide to

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Why do we need to sprinkle water on cotton clothes before ironing them?

Cotton, linen and hemp clothes usually gain wrinkles after washing. These wrinkles do not get erased with dry heating. Sprinkling the water softens down clothes. When heat is applied on it, clothes easily get smooth and it makes it easy to iron out the wrinkles. Also, when the wet clothes get ironed, steam is created

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Why should we microwave food in glass utensils, and not in metal ones?

Microwaves generate very short, high frequency radio waves that are just right for being absorbed by water, fat and sugar molecules within organic matter. This energy causes them to vibrate at very high speeds, which in turn generates heat that cooks the food. However, the molecules of metal objects heat up quickly and with nowhere

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Why can we touch hot things for longer time when our hands are wet?

This is due to the Leidenfrost effect. In this, effect, when the wetness on the hands comes in contact with something hotter than the boiling point of the liquid (the hot object, in this case), it produces an insulating vapour layer preventing the water on the hands to become hot rapidly. A sort of film

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