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The ancestors of modern land

plants evolved in aquatic environments. The

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transition from water to land caused the plants to develop some helpful adaptations.

Large clouds of gas combined

into solid particles of matter. Gravity caused

these particles of matter to be pulled toward                                             each other which led to the formation of planets and moons. One of the planets that was formed by this occurrence was Earth

Biochemist Stanley Miller and

Harold Urey conducted an experiment in

order to form organic compounds by simulating the conditions of Earth’s early atmosphere

These single-celled organisms

were able to survive in Earth’s harsh conditions.

They only contain one cell and eventually evolved

into multicellular organisms.

The amount of oxygen when

Earth was first formed was believed to be

insignificant until the GEO occurred, which

caused a sudden jump oxygen levels.

Originally, there was only

prokaryotes not eukaryotes. Eukaryotes

are believed to have been formed when one prokaryote engulfed another. The difference between a prokaryote and a eukaryote is that a eukaryotes  have a nucleus.

This was when most major

animal phyla appeared in the fossil record.

Another result from this was the divergence

of most modern metazoan phyla. Overall, it was a lot of diversification of other organisms.

During the earlier period of                                                         Earth, most organisms were only living in                                            water. Then centipede-like animals started                                           exploring the surface more father then water. Eventually over time, organisms evolved to be able to survive on land. This led to the many animals we have today on land including ourselves.

This is the age of the

dinosaurs.  It lasted almost 180 million                                                          years. This was also when Pangea was

converted into modern continents.

Pangea became Laurasia and Gondwana when it  split.

This is the second largest

Extinction in Earth’s history right behind

The Permian extinction, which was the worst.

86% of all species were lost in this extinction. 86% is the second largest

This is the greatest mass

extinction in Earth’s history. It was

more devastating then the other four                                                             major extinctions. A whopping 96% of all species were lost. This was due to volcanic eruptions.

This extinction is responsible for                                    eliminating 80% of all species. This is the                                                third worst extinction out of the five. Many large amphibians became extinct due to this.

This is the most recent

extinction out of the five major extinctions.

It may also not be the last extinction. 76%

of all species was lost during this.

One of the five major

extinctions. It occurred during the

Devonian period. 75% of the species

were lost due to this disaster.

Gondwana was formed.

It was a supercontinent that extended

from the northern tropics to the

southern polar regions. The rest of the world was all water Gondwana.

A period of time where the

continents moved to where they are

today. This occurred during the Cenozoic Era, which was the third major era of Earth’s history.

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