Question

QUES 1)
How long has there been life on Earth?

A) 4.6 billions years B) 3.7 billions years C) 65 million years D) 3 million years
_____________
QUES 2)
In what sphere do chemicals have the shortest average time?

A) biosphere B) lithosphere C) hydrosphere D) atmosphere

Answer 1

1. about 4.5 billion years
2. i think c.

Answer 2

Ok. What about QUES 2

Answer 3

noooo, ques 1 is 4.5 billion years and ques 2 is c

Answer 4

thats why i put 1. and 2.

Answer 5

Sorry, I just realized it.

Answer 6

no problem

Answer 7

Longer than anyone knows.

Answer 8

Thanks for the medal!

Answer 9

1. isn't 4.5 billion years old...that's the age of the Earth, life started about a billion years after or so, so the answer should be 3.7 billion years.
2. Is C I think.

Answer 10

For question #1 there is a lot of speculation, many people have different beliefs and theories but it is best to do the answer that corresponds with your textbook.

Answer 11

You guys are confusing life with the age of the earth, that's all i'm saying...age of the earth is about 4.6 billion years old...where it was mostly molten, obviously life wasn't on it at that time, it took about 500 - 1 billion years for life to start.

Answer 12

billion years after*