Earth History & Evolution

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Last updated: December 19, 2020

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First submitted	December 19, 2020
Times taken	35
Average score	14.7%
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Hint	Answer
When the earth formed	4.6 bya
Where earths water came from	asteroids
When life formed	3.5 bya
first producer organism	Cyanobacteria
event caused by high oxygen levels	huronian glaciation
layer formed after event,helps to protect from radiation	ozone layer
Domain with nucleus (Organelle that holds DNA)	eukaryote
First organelle to merge with cell ( is the powerhouse of the cell)	mitochondria
when multicellular life formed	600 mya
Major cooling event that covered world in ice sheets	snow ball earth
Last period of the protezoic eon	edicaran Period
first phylum of animals	sponge
Major event that created most modern phylum,chordates,Arthropods,etc	cambrian explosion
First Chordate	pikaia
Large Arthopod,had multiple fins,was three feet long in length	Anomalcaris
Multi-eyed,long shouted, arthopod	opabinia
When Plants first went on land	500 mya

Hint	Answer
Event that led to first jawless fish,sea scorpions,and orthoceras	ordovician radiation
name of group of large Arthropods,were predators,would be ancestors of scorpions	sea scorpions
First Mass extinction,caused by cooling temperatures,would kill 70% of life	ordovician mass extinction
When Jawed Fish evolved	400 mya
group of armored fish,includes dunkleosteus	Placoderms
large fungi that emerged on land	Prototaxites
when first trees evolved	350 mya
Group of fish that would led to Terrestrial vertebrates	Lobe finned fishs
During the Carboniferous period oxygen levels rose to...	35%
Large dragonfly,largest flying arthopod to ever live	meganeura
First reptile to evolve	Hylonomus
Large centipede,largest terrestrial arthopod to ever live.	arthropleura
Group of reptiles that would dominate Permian,have one hole behind eye hole	Synapsids
Large sailed reptile,commonly mistakened as a dinosaur	dimetrodon
Group of reptiles,had two holes behind eye hole,would led to dinosaurs and modern reptiles	Diapsids
Largest Mass extinction to ever happen,killed 90% of all life on Earth	Great dying extinction
Group of reptiles that would dominate the next era,includes steogsaurus,brontosaurus,t-Rex	Dinosaurs