The hard, solid rocks, whose composition or texture has been changed by heat or pressure in the Earth are called____________?

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Second layer of Earth’s atmosphere is__________?

A. Stratosphere B. Mesosphere C. Troposphere D. Thermosphere...

What is the symbol of Gold?

A. Ag B. Au C. S D. None...

_______________ causes biomagnification problem in the Ecosystem.

Lead Mercury Chromium Copper...

The most magnificent and brightest star is ?

A: Sun B: Sirius C: Pistol D: Canopus...

Fat is digested in which part of body?

a) Small intestine  b) Mouth c) Large intestine d) Spleen...