Biosensor is used to measure
According to Big Bang Theory, the Universe began about __________ billion years ago
The planets visible to us without using a telescope are __________
The bodyguard of the Earth is __________ that save the Earth from many Comets and Asteroids
1 light year =
The Great Spot is on the planet __________
The planet which is easily visible from the Earth is
The salinity of sea water is determined by the amount of common salt (Sodium Chloride) in __________ of sea water
The position of an element in the Periodic Table is determined by its __________ number
Blood is cleaned by __________
