Answer:
4600-4500 million years ago, the Earth formed and its crust cooled to become solid. 4500-4400 million years ago, the oldest known thing to have formed on Earth, zircon, formed along with solid crust and oceans. 4200-4100 million years ago, the close of the Hadean Period (there are no surviving rocks).
Answer:
Over three-quarters of the planet earth is covered with water. ... At room temperature (anywhere from zero degree centigrade to 100 degrees centigrade), water is found in a liquid state. This is because of the tiny, weak hydrogen bonds which, in their billions, hold water molecules together for small fractions of a second.
Explanation:
D. Earth's temperature is high enough that water on the surface
The purple one that looks like an x
C)because many orginisms can live in the same area.However an ecosytem does not always eat the same the same food
The correct answer will be “Biological Evolution”