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Curious Questions from Curious Minds!

Welcome to Curiopedia, where imagination and discovery take shape! Discover something new today with these curious questions from children. Click on the ‘View Answer’ button to find out the answer! If you want your (child’s) curious question answered and featured here, submit it now.

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Month Year

  • Hear and There

    How many decibels can a human hear?

    Abinau. G , Chennai

    Hearing is measured in Hertz (Hz) whereas loudness is measured in decibels (dB). The commonly stated range of human hearing is 20 Hz to 20,000Hz. An individual’s hearing range varies according to the general condition of a person’s ears and nervous system. The range also becomes smaller as a person gets older. As far as loudness is concerned, humans can typically hear starting at 0 dB. Sounds that are more than 85dB can be dangerous for your hearing. Animals have a much larger hearing range than humans, which is why they can hear many sounds that we cannot.
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  • Blood Bank

    Do animals have blood types like A positive and B positive?

    Rishon Anthony , Chennai

    All animals do have different blood groups. Humans have a system based on A, B and O. Other animals have different systems. For example, dogs have a system called DEA and have about eight different blood groups!
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  • In A Fog

    Why does a car window fog up inside if it rains outside?

    M. Lalitha Bhavana , Hyderabad

    Car windows fog up when water condenses on them. This can happen both on the inside and the outside. When it rains, the humidity of the air is high, meaning that there is more water vapour in the air. The cold air coming out of the AC makes the glass of the windows become cool. Since it is humid outside, water condenses on the outside of the glass. Moisture tends to condense on the inside of the windows when the air in the car is warmer than the air outside. When warm, moist air in the car meets colder glass surfaces, it causes condensation and the windows fog up on the inside.
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  • Halt!

    What will happen if the Earth stops rotating?

    Satchit , Bangalore

    Interesting question, Satchit! The probability of such an event is practically zero in the next few billion years. However, if it did happen, a sudden stop of the Earth’s spinning motion would displace everything that’s not firmly fixed to the bedrock. This is because despite the Earth’s spin being stopped, the atmosphere would continue to be in motion at its original speed, about 1770 km per hour (that’s super fast!). Therefore, everything that’s not firmly attached to the bedrock will be swept off the ground – huge rocks, topsoil, buildings, vehicles, and even your beloved television, will be lifted up and swept away by the atmosphere.
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