who can tell the age of earth with proof?

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

The most direct means for calculating the Earth's age is a Pb/Pb isochron age, derived from samples of the Earth and meteorites. This involves measurement of three isotopes of lead (Pb-206, Pb-207, and either Pb-208 or Pb-204). A plot is constructed of Pb-206/Pb-204 versus Pb-207/Pb-204.

If the solar system formed from a common pool of matter, which was uniformly distributed in terms of Pb isotope ratios, then the initial plots for all objects from that pool of matter would fall on a single point.

Over time, the amounts of Pb-206 and Pb-207 will change in some samples, as these isotopes are decay end-products of uranium decay (U-238 decays to Pb-206, and U-235 decays to Pb-207). This causes the data points to separate from each other. The higher the uranium-to-lead ratio of a rock, the more the Pb-206/Pb-204 and Pb-207/Pb-204 values will change with time.

If the source of the solar system was also uniformly distributed with respect to uranium isotope ratios, then the data points will always fall on a single line. And from the slope of the line we can compute the amount of time which has passed since the pool of matter became separated into individual objects.

As it turns out, this plot DOES in fact fall on a straight line, and indicates that the solar system (including the Earth) is about 4.5 to 4.6 billion years old.

Answer 3

welll earth is made of a rocks ....rocks formed from the lava present in the subsurface......

now we have many techniques from which we can determine the age of the earth....most effective of all is RADIO ACTIVE DATING...in which we measure the decay of the radioactive substance present in the rocks which has come from the earth's core.....so by measuring the activiity and decay of such material........

For calculating the Earth's age Pb/Pb isochron age, derived from samples of the Earth and meteorites. This involves measurement of three isotopes of lead (Pb-206, Pb-207, and either Pb-208 or Pb-204). A plot is constructed of Pb-206/Pb-204 versus Pb-207/Pb-204.

The oldest rocks which have been found so far (on the Earth) date to about 3.8 to 3.9 billion years ago (by several radiometric dating methods). Some of these rocks are sedimentary, and include minerals which are themselves as old as 4.1 to 4.2 billion years. Rocks of this age are relatively rare, however rocks that are at least 3.5 billion years in age have been found on North America, Greenland, Australia, Africa, and Asia.

Answer 4

It's only possible to estimate the age of the Earth.

Answer 5

Can't tell at all. All of the scientific estimates are just guesses based on flawed methods. Depending on the answer you want, you can use several different methods and then pick the answer you like.

Answer 6

Scientists have a lot of evidence as to the age of the earth.

Read this:

http://www.talkorigins.org/faqs/faq-age-of-earth.html

Answer 7

They can do radiometric dating on rocks to determine how old it is.
http://en.wikipedia.org/wiki/Radiometric_dating

http://en.wikipedia.org/wiki/Age_of_the_Earth

RADIOMETRIC DATING.--
It's easy for creationists to dismiss it because like all science, it's too hard for some people to understand.

Answer 8

6221 years old

Proof - the Bible

Answer 9

no human (not refering to religous crap)