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The Beginning of the Solar System.
The solar system was formed out of a dense cloud of interstellar gas and dust. There may have been a shock wave from a nearby exploding star that pushed dust and gases into a cloud. When this cloud collapsed it created a solar nebula, spinning and swirling collecting more dusts and gasses

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4.5-4.6 Billion Years Ago   (Start of Precambrian) 

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4.5-4.6 Billion Years Ago   (Start of Precambrian) 

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Origin of The Earth
It was believed that Earth formed as a cool rocky surface. It did not have an atmosphere. It began to heat up with 3 different processes which created planetesimals the first raw materials on Earth

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The First invertebrates Appear
The First invertebrates were microscopic organisms that developed in the ocean. They had soft bodies. These little creatures would be the base of evolution for many creatures.

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Cyanobacteria exists.
Cyanobacteria is a type of bacteria that exists in all types of water. This single-celled organism uses photosynthesis to get energy. It may have been formed by the endosymbiosis of the by eukaryotic cells.

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Great Oxygenation Event
Cyanobacteria are responsible for the Great Oxygenation event. When cyanobacteria perform photosynthesis it releases oxygen therefore causing the event. This event allowed for organisms to have more freedom in how they develop eventually creating organisms with respiratory systems.

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The First Multicellular Organisms
The First plants
Scientist have found fossils that date as far back as 700 millions years ago showing evidence of multicellular organisms. Protists are classified as unicellular organisms as well as multicellular. These may be the first multicellular organisms.

The first plants were algae that existed in the ocean. They were protists. These plants did not have stems nor roots. They used photosynthesis to gain energy.

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Ozone Layer Forms

The Ozone layer was formed out of the chemical reaction between heat, sunlight, oxygen, and nitrogen. The Ozone layer protects living organisms from ultraviolet radiation by absorbing it. This allows organisms to move onto land without being harmed by the Sun.

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What home appliances use a lot of electricity in your opinion? I'm sure one of the first things that comes to mind is a refrigerator. The larger the fridge at home, the more energy it consumes.

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The First fungi appears
The the first Fungi may have appeared 600 million years ago or maybe earlier. The first time fungi would move to land would be 460 Million ago. By 250 Million years ago they may have been the most dominant species.

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First Vertebrates appear
The first vertebrates
were jawless fish that had a cranium but no vertebral column.  It will take maybe about 50 million years later until vertebrates form a vertebral column.

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A huge boom of Life

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Insects First Appear
The first insects were Hexapoda which may have appeared about 479 Million years ago. Insect flight started 406 million years ago.

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Ends in Mass extinction

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Ordovician-silurian Extinction 440 Million Years Ago 

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Ordovician-silurian Extinction 440 Million Years Ago 

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Animals start to move to the land

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The First Amphibians Appear
Amphibians evolved from a lobed-fin fish. Amphibians were very successful as they did not have many predators. As well as the land giving them many resources to thrive. They were very dominant in this era.

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Life Invades the Land
Now that the Earth is protected by the Ozone layer it allows animals to inhabit the land. The first animals to take this chance were amphibians. The developed breathing sacs called lungs to be able to survive on land. They also had developed a bone structure to adapt to the land.

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Reptiles and Winged Insects

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Reptiles First Appearance
The reptiles were very different from the amphibians because they adapted very well into the land. They had waterproof scales and well developed lungs. The first reptiles probably feasted on tiny insects.

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Abundance of Amphibians, Pangea comes into effect

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Paleozoic Era ends

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250 million years ago

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DINOSAURS!!! WOOO!!!

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Dinosaurs First Appear
The dinosaurs branched off reptiles and immediately started dominating the land, sky, and the sea. Dinosaurs were so diverse and adaptable they would be the most powerful type of animals. Some using their sheer size to overpower other creatures are special body features to survive.

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210 Million Years Ago
Dinosaurs NOO D:

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A HUGE abundance in dinosaurs. Dinosaurs are dominant.

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The Arrival of Birds
The earliest birds evolved from the theropods dinosaurs. They shared the common trait of having hollow bones. This made them lighter than their sizes allowing for quick movement or travel.

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First Mammals Exist
Both mammals and birds both evolved from reptiles. Both types of animals evolved ectothermy. This means to be able to regulate ones temperature through actions rather than words. They also gave live birth.

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Plants become abundant because of flowering plants.

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The First Flowering Plants
The oldest fossil of a flowering plant was discovered and it was dated to be 125 years old. Flowering plants had reproductive organs that allowed them to populate fast. Insects also helped these plants spread quicker.

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Cretaceous-tertiary Extinction
This was the latest mass extinction. A huge meteor hit the ground sending dust into the air blocking sunlight. This made many animals retreat to the ground while the dinosaurs couldn't escape wiping out most of them.

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Mesozoic Era ends

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Pigs, deer, rhinos, shrew, and many other animals that still exist today.

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Apes, cows, dogs, cats, and many other modern day animals.

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First Humans. The period we are currently in.

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Humans have appeared
The first human appeared about 2.5 million years ago but the last ancestor that we share with chimpanzees existed 7 million years. They had a structure that allowed them to travel for long distances. With their added stamina they were very dominant.

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Ice Age and Snowball Earth
The Ice Age was a period of time in which the Earth had a huge temperature reduction causes many places to freeze over. Many animals died from this event forcing many other animals to adapt. This may not even be the first time this has happened. The Snowball Earth Theory states that this may have happened before maybe 765 million years ago.