Early scientific attempts st determining Earth's age gave a number that was around 4.6 billion years old.
<h3>Radiometric dating methods</h3>
The age of rocks can be most determined by radiometric dating.
This process of radiometric dating makes use of two different isotopes of a sample.
It is known that Radioactive isotopes break down within a known amount of time and this enables geologists to determine the age of a sample with the aid of equipment like thermal ionization mass spectrometer.
Learn more about Radiometric dating at
The correct answer for the question that is being presented above is this one: "oxygen became available from cyanobacteria." About 1.2 billion years ago, eukaryotic and multicelled organisms evolved because oxygen became available from cyanobacteria.
The country of Russia, the largest country in the world, lies on a landmass that is comprised of two continents,called Eurasia (hint: Europe and Asia). This country is seperated by the Ural Mountains. Most of the population of this country lives in European Russia to the west of the mountains.
Answer:
A landscape that is easy to remember
Explanation:
