how old is the earth?

Answer 1

It's based on several things:

1) dating meteorites. When we find a meteorite from this solar system that has a similar composition to earth, you get many young ages, but the oldest and most common date to 4.6 Ga (billion years).

2) isotope trends. When you look at certain radiogenic isotope ratios that change with time, like Rb/Sr or U/Pb, you find that many rocks with differnt ratios of many ages form a line, and the line traces back to an origin of 4.6 Ga as well.

The oldest life is 3 1/2 Ga, the oldest rock is about 4 Ga, and the oldest date ever found is on the highly durable mineral Zircon from Australia, it's date is 4.2 Ga. So, there is no direct method, it is based on inferences. However, many different inferences lead to the same number 4.559 Ga (to be specific).

You would have to throw out everything we know and love about Geology to accept a young earth view. When you look at the Grand Canyon, how can you say that only took 6000 years to form?

Answer 2

About four and a half billion years, the universe is about 19 billion years old.

'Dark Matter' is a lie and so is anti gravity because gravity is only the distortion of space and time by mass.

Anti mass is just an absurd idea, time travel is also impossible because every vehicle has a top speed below that of the speed of light.

Answer 3

Approximated 5 billion years

Answer 4

according to geologists, she is 4.5 billion years old. the sun, is around 5 billion years old...and the moon is roughly 4 billion years old. the universe is approximately 13 -18 billion years old.

Answer 5

About four and a half billion years old.

Answer 6

Roughly 4.5 billion years old

Answer 7

As some in Kentucky would have you believe, 5-6000 years old.

Oh, and T-rex was a resident aboard the ark as well.

Go with science.

Answer 8

around 4.5 billion years old

Answer 9

4.5 billion right number

Answer 10

3000 billions years.