What do we know about the natural history of planet Earth? Our planet formed from dust left over when a massive cloud of cold dilute gas and dust condensed
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What do we know about the natural history of planet Earth? Our planet formed from dust left over when a massive cloud of cold dilute gas and dust condensed to form the Sun 4.6 billion years ago. The Moon formed from remnants of a collision between Orpheus and the Earth after the Great Iron Catastrophe formed the Earth's core. Our planet's surface was initially too hot to form a crust. Four billion years ago, the Earth was still heavily bombarded by a flux of extraterrestrial objects. Continents did not exist when the Earth first formed but grew over time. Most of the water on Earth is in liquid oceans, but much of it has at times been buried in the land, vaporized into the atmosphere, or frozen solid. Life existed before DNA, proteins, chlorophyll, and rhodopsin evolved. The solar flux incident on the top of the atmosphere has increased by 40% over the history of the Earth. During the Proterozoic Era, photosynthetic bacteria helped remove most of the carbon dioxide from the atmosphere and from MY to MY MYA Era oceans and atm osphere solid Earth and Sun m olecules and cells organism s and ecosystem s -300 -200 -4900 -200 -100 -4800 -100 0 -4700 ZAM S 100 -4600 100 200 -4500 200 300 -4400 300 400 -4300 400 500 -4200 500 600 -4100 600 700 -4000 700 800 -3900 800 900 -3800 900 1000 -3700 1000 1100 -3600 1100 1200 -3500 1200 1300 -3400 1300 1400 -3300 1400 1500 -3200 1500 1600 -3100 1600 1700 -3000 1700 1800 -2900 1800 1900 -2800 1900 2000 -2700 2000 2100 -2600 2100 2200 -2500 2200 2300 -2400 2300 2400 -2300 2400 2500 -2200 2500 2600 -2100 2600 2700 -2000 2700 2800 -1900 2800 2900 -1800 2900 3000 -1700 3000 3100 -1600 3100 3200 -1500 3200 3300 -1400 3300 3400 -1300 3400 3500 -1200 3500 3600 -1100 3600 3700 -1000 3700 3800 -900 3800 3900 -800 3900 4000 -700 4000 4100 -600 4100 4200 -500 4200 4300 -400 4300 4400 -300 4400 4500 -200 4500 4600 -100 4600 4700 now Phaner- ozoic Proterozoic The N aturalH istory ofPlanetEarth Tim eline: Five Billion Y earsofSolar and G lobalEvolution H adean Pre- H adean A rchaean Name ten or more globally important events in any column. Think about the W5H: who what when where why how Emphasis on connections not collections
What do we know about the natural history of planet Earth?
Our planet formed from dust left over when a massive cloud of cold dilute gas and dust condensed to form the Sun 4.6 billion years ago. The Moon formed from remnants of a collision between Orpheus and the Earth after the Great Iron Catastrophe formed the Earth's core. Our planet's surface was initially too hot to form a crust. Four billion years ago, the Earth was still heavily bombarded by a flux of extraterrestrial objects. Continents did not exist when the Earth first formed but grew over time.
Most of the water on Earth is in liquid oceans, but much of it has at times been buried in the land, vaporized into the atmosphere, or frozen solid. Life existed before DNA, proteins, chlorophyll, and rhodopsin evolved. The solar flux incident on the top of the atmosphere has increased by 40% over the history of the Earth. During the Proterozoic Era, photosynthetic bacteria helped remove most of the carbon dioxide from the atmosphere and released oxygen which was toxic to most bacteria at the time.
Eukaryotes evolved by serial endosymbiosis several times. Eukaryotes are masters of multicellularity whereas bacteria are masters of metabolic diversity. Plants and animals are relatively recent evolutionary developments. Invertebrates ventured out of the seas before vertebrates invaded the land. Whales and other marine mammals are recent additions to the oceans.