when did the world start an how was it before the continental drift

https://www.google.com/search?source=hp&q=age+of+the+earth&oq=age+of+the&gs_l=psy-ab.1.0.0l4.2054.4561.0.10679.10.10.0.0.0.0.167.1271.0j10.10.0....0...1.1.64.psy-ab..0.10.1268...46j0i131k1j0i46k1.PQc01Q8yMhg

http://www.enchantedlearning.com/subjects/dinosaurs/glossary/Contdrift.shtml

The world is estimated to be about 4.5 billion years old, but life emerged much later. The first signs of life on Earth date back to around 3.5 billion years ago. However, your question also refers to the period before the continental drift, which is also known as Pangaea.

Pangaea was a supercontinent that existed around 335 million years ago, during the late Paleozoic and early Mesozoic eras. It was a time when all the continents were fused together into one massive landmass. The breakup of Pangaea began around 175 million years ago, leading to the formation of separate continents we have today.

Now, to explain how we know all this information: scientists use various techniques and evidence to study Earth's history. One important method involves examining geological features and sedimentary rock formations. Fossils found within these rocks provide valuable clues about past life forms and the time periods in which they lived.

Additionally, scientists use radiometric dating techniques to determine the age of rocks and minerals. By measuring the concentration of radioactive isotopes and their decay products, they can estimate the age of rock formations.

The study of ancient magnetic fields preserved in rocks, known as paleomagnetism, also provides evidence for continental drift. By analyzing the magnetic properties, scientists can reconstruct the movements of continents over time.

To summarize, our knowledge of the world's history, including the period before continental drift, comes from a combination of studying geological features, analyzing fossils, using radiometric dating techniques, and examining paleomagnetic data.