The ancestors of modern land
plants evolved in aquatic environments. The
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.