Fossils represent the animals or plants that were living at a certain time, and can be used to age rocks.
The seven seas are the Arctic, the Atlantic, the Indian, the Pacific, the Mediterranean<span>, the </span>Caribbean<span>, and the Gulf of Mexico.</span>
If you could dig a tunnel right through the Earth you could theoretically free-fall to the centre of our planet in just eighteen minutes. You can’t, of course: such a tunnel would have to tolerate temperatures as high as the surface of the Sun and pressures three and a half million times greater than those at the Earth’s surface.
The sequence of events that can lead to magma becoming soil is C. crystallization followed by exposure and weathering. Under these circumstances it may happen that magma actually turns to soil - it cools off so much that it becomes the ground we walk upon.
