CURRENT AFFAIRS

2016

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Scientists have discovered an ancient space rock that can reveal more about life on earth. What is this meteorite called
A
Ost 55
B
Ost 65
C
Ost 75
D
Ost 85
Explanation: 

Detailed explanation-1: -The ancient rock is a rare example of a carbonaceous chondrite, a type of meteorite which often contains organic material.

Detailed explanation-2: -Meteoroids are what we call “space rocks” that range in size from dust grains to small asteroids. This term only applies when they’re in space. Most are pieces of other, larger bodies that have been broken or blasted off.

Detailed explanation-3: -They consist mainly of iron-nickel metal with small amounts of sulphide and carbide minerals. During the decay of radioactive elements in the early history of the solar system, many asteroids melted and the iron they contained, being dense, sank to the centre to form a metallic core.

Detailed explanation-4: -Meteorites are fragments of rock or metal that fall to Earth from space. They are very rare, but many people find unusual rocks or pieces of metal and wonder if they might have found a meteorite.

Detailed explanation-5: -Where Do Meteorites Come From? All meteorites come from inside our solar system. Most of them are fragments of asteroids that broke apart long ago in the asteroid belt, located between Mars and Jupiter. Such fragments orbit the Sun for some time–often millions of years–before colliding with Earth.

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