Paragraf Tamamlama 96. Soru

96.

Millions of years ago, there was no life on this planet. ……….. . It was just a ball of flaming gases. These gases were in a state of considerable chemical turmoil, reacting together to form and reform chemicals. As time passed the gases cooled, became liquid, and eventually a thin crust was formed over the surface. Beneath this crust, the centre of the Earth was, and remains today, a molten mass of rocks and :-):-):-):-)ls with a solid core.