4.5 Billion years ago, the newly formed molten Earth bega...
<div><span style="font-size:16px;">4.5 Billion years ago, Earth forms.</span></div><div><br></div><div><span style="font-size:16px;">The newly formed molten Earth began to cool off. </span></div><div><br></div><div><span style="font-size:16px;">There was NO OXYGEN in the early earth atmosphere. </span></div><div><br></div><div><span style="font-size:16px;">Could you survive here?</span></div><div><br></div><div><span style="font-size:16px;">Do you do Aerobic or Anaerobic respiration?</span></div> www.universetoday.com
<div><span style="font-size:16px;">4 Billion Years Ago: First Molecules of Life - How did life begin? We have to start with the molecules of life - where did they come from? </span></div> www.youtube.com Click this link to take a survey about this video: https://www.surveymonkey.com/r/X2D8D7R This animation was sponsored by the Center for Chemical Evolution, ...
<div><span style="font-size:16px;">3.8 Billion Years Ago</span><span style="font-size:16px;">: the first cell: a Prokaryote (aka bacteria)</span></div><div><br></div><div><span style="font-size:16px;">Experiemnts like Miller-Uery have shown that amino acids, some nucleotides, lipids and simple sugars can form from non-life....they all somehow got together and POOF - the first cell</span></div><div><br></div><div><span style="font-size:13px;"><span style="font-size:16px;">It must have been a Prokaryote because they are so much more simple than Eukaryotic Cells like the ones we have already studied (Plants, Animals, and Protists are all Eukaryote cells). </span></span></div><div><br></div><div><span style="font-size:13px;"><span style="font-size:16px;">Is this first bacteria an Aerobic respirator or an Anaerobic respirator? (consider...is Oxygen available?)</span></span></div><div><br></div> media1.shmoop.com
<div><span style="font-size:16px;">3 Billion Years Ago:</span><span style="font-size:16px;"> Photosynthetic Bacteria evolve</span></div><div><br></div><div><span style="font-size:16px;">These bacteria lived in mounds that formed hard rock-like shells which can be found now as fossils - like the ones this guy is laying on! </span></div><div><br></div><div><span style="font-size:16px;">What GAS would a PHOTOSYNTHESIZING bacteria put into the atomosphere?</span></div> farm2.staticflickr.com
<div><span style="font-size:16px;">EVIDENCE of Oxygen:</span></div><div><span style="font-size:16px;">When oxygen begin filling the atmosphere and oceans, it reacted with the iron in the water and the iron 'rusted' - just like iron in metal rusts. Rust built up in the soil and can be found today as beautiful red bands in rock layers. </span></div> www.luckysci.com
<div><span style="font-size:16px;">2.7 Billion Years Ago:</span><span style="font-size:16px;"> The first AEROBIC prokaryotic evolved.</span></div><div><br></div><div><span style="font-size:16px;">What molecule do Aerobic organisms need in order to perform cellular respiration? </span></div> www.toonpool.com
<div><span style="font-size:16px;">2.1 Billion Years: First Eukaryote Cells</span></div><div><br></div><div><span style="font-size:16px;">For over 1 Billion years life has been nothing but Prokaryotes (bacteria). But then something very special happened...</span></div><div><br></div><div><span style="font-size:16px;">Watch this video to see the leading theory for how Eukaryote cells (like Protists, Plants and Animal cells) came to be!</span></div><div><br></div> www.youtube.com Explore the endosymbiotic theory with the Amoeba Sisters! This theory explains the development of the eukaryote cell from prokaryote cell symbiosis. Scientif...
<div><span style="font-size:16px;">0.6 Billion Years ago (600 million years) First Multicellular organism</span></div><div><br></div><div><span style="font-size:16px;">So far all life has been single cellular. But fossil evidence from around 600 mya shows the first multi cellular life, which looked something like this worm. It was very small and simple - but it was a start.</span></div><div><br></div><div><span style="font-size:16px;">All multicellular organisms are made of Eukaryote cells!</span></div> www.gambassa.com
<div><span style="font-size:16px;">200,000 years ago</span></div><div><br></div><div><span style="font-size:16px;">This is when we first see evidence of modern humans</span>. Do you recognize the skull of your great, great, great, great, great, great, great, great, great, great, great, great, great, great, great, great, great, great, great, great, great, great, great, great, great, great, great, great, great, great, great, great, great, great, great, great, great, great, great, great, great, great, great, great, great, great, great, great, great, great, great, great, great, great, great, great, great, great, great, great, ....grandmother?</div> ichef.bbci.co.uk
<div><span style="font-size:16px;">Today! -Now YOU are here!! Draw a little picture of yourself in your notes beside 'you' on the timeline! </span></div> upload.wikimedia.org

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