Answer:
convection in the asthenosphere
Answer:
In uranium-lead dating, for instance, the radioactive decay of uranium into lead proceeds at a reliable rate. Based on the very old zircon rock from Australia we know that the Earth is at least 4.374 billion years old.
And that's how after rounding we know that earth is 4.5 years old.
Answer:
I would say Fossil Fuels
Explanation:
I don't know your choices but Fossils fuels would be your best bet if it's an option.
Fossils of very old land creatures is the correct answer