Question

Under great heat and pressure clay changes into a)Granite
b) Basalt c)Coal Slate

Answer 1

Answer:

The Earth was formed about 4.6 billion years ago. The planet was so hot that the entire Earth was molten or liquid. As the Earth cooled, the lightest materials floated to the top and the heaviest materials sank to the center. The outer part of the Earth, the crust, consists of the lightest rock.