Which "statements" give the right relative age of these layers of rocks ?

The oldest layer of rocks is at the ____________

You want to decide the absolute age of the fossil at the top, which of these statements is right? " Be careful absolute age!)

Between the sedimentary rocks, there are layers that have no fossils, by knowing the absolute age of these rocks you can tell the of the rocks below or above and the age of fossils in them , these rocks are ___________________

You can find the absolute age of a fossil by two ways, if there is a close _____________layer or an/a___________fossil

You will be lucky if you find an _________fossil in the layer of rock you are studying, because it can tell you the ______________of this layer of sedimentary rock and any other fossils in it.

_________________are found in one layer of rock all over the world over a short period of time, and they can help you decide the absolute age of the rock they are found in

The absolute age of igneous rocks is determined by________________

Uranium in igneous rocks changes into lead, this tells that Uranium is ____________and undergoes radioactive ______________

Half of the Uranium atoms will decay to lead after 704 million years, this time is known as the ___________of Uranium.

"Click on the image to see it more

clearly" In an igneous rock layer that had Uranium (parent isotope) and lead ( daughter product ), you analyzed the ratio of the two atoms, you discovered that two half lives have passed, what would be the age of the igneous rock ? ( Note: half life of Uranium is 704 millions years)

When an unstable atom changes to a more stable one we call this ___________