Answer:
4 billion years
Explanation:
Scientists have found the oldest known rocks on Earth. They are 4.28 billion years old, making them 250 million years more ancient than any previously discovered rocks. Earth formed about 4.6 billion years ago from a disk of gas and dust circling the sun.
Answer:
C, frequent winter storms.
Explanation:
In the northeast, it usually does not experience tornadoes, it has low humidity and an average amount of rainfall. But the northeast has a lot of winter storms.
1.The population is rising fast because of inadequate amount of knowledge about family planning.
2.Census is done to check the growth of our population.
3.