In the earths mantle the convection currents pass through the mantle which then causes friction in the tectonic plates causing earthquakes,volcanoes or tsunamis
All of the above its all right
Answer: No it is not. It is part of Astronomy.
* there should be water
* there should be plants(life)
* there should be atmosphere
* there should be oxygen and carbon dioxide,ect,................
Answer:
7) The Cretaceous period and it lasted for 80 million years
8) The Cenozoic era for 65 million years
9) 4.5 billion years ago
10) It began 252.2 million years ago
11) It ended 66 million years ago
12) About 190 million years
Explanation:
Hope this helps :)
