Question

Describe the earth’s geography and atmosphere during this time period. What major events happened to help shape the earth during that time period? What kinds of organisms lived on the earth during that time period? What were some key events that happened during that time period? How did that time period end? write it in a story

Answer 1

Hi There!

Earth is known to be 4.6 billion years old (classified by scientists). A lot of the atmosphere that have today was created during the first million years of Earth's presence. Many elements like vapor from water, nitrogen, and carbon dioxide is what the atmosphere was maily made of. Many organism that lived in that era were really big... Many were dinosaurs... Lots of organism we have now a days were aroung back then but they were way larger. Like when you Rolly Pollies outside your house, those were 1,000 times bigger when dinosaurs around. Another example are alligators. That period ended when scientists said that a meteor hit Earth and killed almost everything. Some of most key events that occured during that era were the many fossils found by scientists that are founf today in museums.

Hope This Helps :)

Answer 2

The geological history of Earth follows the major events in Earth's past based on the geological time scale, a system of chronological measurement based on the study of the planet's rock layers (stratigraphy). Earth formed about 4.54 billion years ago by accretion from the solar nebula, a disk-shaped mass of dust and gas left over from the formation of the Sun, which also created the rest of the Solar System.

Earth was initially molten due to extreme volcanism and frequent collisions with other bodies. Eventually, the outer layer of the planet cooled to form a solid crust when water began accumulating in the atmosphere. The Moon formed soon afterwards, possibly as a result of the impact of a planetoid with the Earth. Outgassing and volcanic activity produced the primordial atmosphere. Condensing water vapor, augmented by ice delivered from comets, produced the oceans.

As the surface continually reshaped itself over hundreds of millions of years, continents formed and broke apart. They migrated across the surface, occasionally combining to form a supercontinent. Roughly 750 million years ago, the earliest-known supercontinent Rodinia, began to break apart. The continents later recombined to form Pannotia, 600 to 540 million years ago, then finally Pangaea, which broke apart 200 million years ago.

The present pattern of ice ages began about 40 million years ago, then intensified at the end of the Pliocene. The polar regions have since undergone repeated cycles of glaciation and thaw, repeating every 40,000–100,000 years. The last glacial period of the current ice age ended about 10,000 years ago