Some Important science Quction
- By : Parveen
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Decibel – Decibel is a unit of measurement for sound, it measures the loudness or volume of the sound waves.
Density -Density is the ratio of the mass of a body to its volume, usually expressed as its specific gravity.
Dynamo – Dynamo is a device that creates electricity by turning around a magnet near a coil of wire.
Electrolysis – Electrolysis is splitting a substance into the separate chemicals that make it up, by passing an electric current through it.
Electrons – Electron is a negatively charged subatomic particle. Electrons are found at varying distances from a atom’s nucleus. They make up almost the entire volume of a atom but only account for a small part of the atom’s mass. Compare to protons.
Element – Element is a basic chemical substance in which all the atoms are the same, and different from the atoms of any other substance.
Energy – Energy is the name given to the ability to do work.
Freezing Point – Freezing Point is the temperature at which a liquid becomes a solid.
Friction – Friction is the resistance that occurs when two objects rub together.
Gravity – Gravity is the attractive central gravitational force exerted by a celestial body such as earth.
Humidity – Humidity is the amount of water vapor in the air.