The petrified remnant of a past life is called  

First life originated from

In the outer core of the earth, iron exists in a _________ condition .

The hot liquid rock material that comes out of the crater is called  

________ is a single land mass which had broken up and formed different continents.

The earth's crust has been constantly fractured and reorganized forming new continents and oceans by the process called

Molten rock below the surface  of the earth is called  

 Which among the following is a unit of distance for expressing astronomical distances?

________ are the result of strain in the rocks of crust and mantle.

Name the supercontinent in the Northern Hemisphere about 400 million years ago.