Practice MCQ Questions and answers on General Science-GK

Noise or Noise pollution is measured in Decibel.

The ozone layer protects the Earth against most UVB coming from the sun.

Absolute temperature is used in application of the ideal gas law and many other laws of thermodynamics. A scale for absolute temperature with degree units the same as on the Celsius scale is known as the Kelvin scale; the absolute temperature scale using Fahrenheit degree units is the Rankine scale.

Ore is metal-bearing rock that can be mined, transported, processed, and sold at a profit. Although a broader definition includes nonmetallic rocks like rock salt and gypsum, most geologists classify these materials as industrial rocks and minerals.

The air in Earth's atmosphere is made up of approximately 78 percent nitrogen and 21 percent oxygen. Air also has small amounts of lots of other gases, too, such as carbon dioxide, neon, and hydrogen.

The newton is the SI unit of force, and is the force which will accelerate one kilogram one metre per second squared. The symbol of the newton in SI is N.

Decibel (dB), unit for expressing the ratio between two physical quantities, usually amounts of acoustic or electric power, or for measuring the relative loudness of sounds.