science
The timeline of earth begin with three eras. The first era was the Paleozoic era. Then after that it was the Mesozoic era. The final and present era is the Cenozoic era, which we live in now. All of these eras had begun something new for the evolution of man today.
The first era was the Paleozoic, which began 600 mya (million years ago). It started with the Cambrian period with the form of algae and simple invertebrates like the jellyfish and worms. Then came the Ordovician period 500 mya, when the first vertebrates began to appear, like graptolites; arthocerous, and primitive fish. Then true plants appear along with the first air breathers like crinoids and eurypterids in the next period, the Silurian period, 440 mya. The Devonian period, which began 395 mya, had more evolved and complex animals like the shark and where aphyllies multiply. Now the Carboniferous period 345 mya, had plentiful ferns grow, and reptiles evolved, then spiders, cockroaches, and scorpions appeared. The last period for this era is the Permian period about 280 mya, when reptiles became abundant, pine like trees developed, then trilobites became extinct at the end of this era.
The second era began in the Mesozoic era gdsgsdhagdh adghdad gahdg dgdghdghasgdgg hjdhu duasd duuadsuhd bbhygsbdya d a jsdfijejf cjiesljv[jv wjvj v[VJ VVFJKSJFIELJFFUJFJDFKSDIF WEOFJ JFIWJFIJWJFJWFO IJWOIFJIOWJFIOJWE FWF
WFW FWUOFIUWOF ]UWFUPWUF
F
FFF MW FW F WFJW F W
FFEFWEFWEFWEFWEFWWSS,MMCJJJSDVJSDHVHSJHVSDDFGHJKJHDHSUDHFGHWFIUGUYWGFUYGWYFGY8WGFY8GW8YEFG8WGF8GWE7F78GWE87FG8W7GF87GWE78FGW78EGF87WEG78FGWEGF87WGEF78GWE87FG87WEGF78WEGF87GWEF
WEFWEFWF
WFWFW
EFWFWF
F
W
F
WF
WFWF
ad·verse [ad-vurs, ad-vurs] Show IPA adjective 1. unfavorable or antagonistic in purpose or effect: adverse criticism.
2.
opposing one's interests or desire: adverse circumstances.
3.
being or acting in a contrary direction; opposed or opposing: adverse winds.
4.
opposite; confronting: the adverse
The first era was the Paleozoic, which began 600 mya (million years ago). It started with the Cambrian period with the form of algae and simple invertebrates like the jellyfish and worms. Then came the Ordovician period 500 mya, when the first vertebrates began to appear, like graptolites; arthocerous, and primitive fish. Then true plants appear along with the first air breathers like crinoids and eurypterids in the next period, the Silurian period, 440 mya. The Devonian period, which began 395 mya, had more evolved and complex animals like the shark and where aphyllies multiply. Now the Carboniferous period 345 mya, had plentiful ferns grow, and reptiles evolved, then spiders, cockroaches, and scorpions appeared. The last period for this era is the Permian period about 280 mya, when reptiles became abundant, pine like trees developed, then trilobites became extinct at the end of this era.
The second era began in the Mesozoic era gdsgsdhagdh adghdad gahdg dgdghdghasgdgg hjdhu duasd duuadsuhd bbhygsbdya d a jsdfijejf cjiesljv[jv wjvj v[VJ VVFJKSJFIELJFFUJFJDFKSDIF WEOFJ JFIWJFIJWJFJWFO IJWOIFJIOWJFIOJWE FWF
WFW FWUOFIUWOF ]UWFUPWUF
F
FFF MW FW F WFJW F W
FFEFWEFWEFWEFWEFWWSS,MMCJJJSDVJSDHVHSJHVSDDFGHJKJHDHSUDHFGHWFIUGUYWGFUYGWYFGY8WGFY8GW8YEFG8WGF8GWE7F78GWE87FG8W7GF87GWE78FGW78EGF87WEG78FGWEGF87WGEF78GWE87FG87WEGF78WEGF87GWEF
WEFWEFWF
WFWFW
EFWFWF
F
W
F
WF
WFWF
ad·verse [ad-vurs, ad-vurs] Show IPA adjective 1. unfavorable or antagonistic in purpose or effect: adverse criticism.
2.
opposing one's interests or desire: adverse circumstances.
3.
being or acting in a contrary direction; opposed or opposing: adverse winds.
4.
opposite; confronting: the adverse