Greenhouse https://nmsgrade8science.weebly.com/causes-of-climate-change.html 0:00 Timeline of the earth 12:00 midnight After about 2.5 billion years, oxygen generated by photosynthesizing single-celled organisms began to appear = beginning of the Proterozoic e r t d — o o n a n s , t o s The Earth is formed out of l m t debris e e d a e a , s c a e n r d n e s s d m i e l g h a m s Proterozoic s n r h i d t n a g a i t s n s l a t n a a n e , i e u a o a around the solar s e , m a t p i b s s c s s P o n ' n m x , n r d a o i n . n n r r l r r e s m a u i a n a o e u a p e e , a b r e t e ÀUVWIRUPRIOLIH o v e Prokaryote , the a d f i s s protoplanetary disk. There is life l g i a e t a h h The name of this eon means "early life". l s L s o o t o r n e v n i c , n o i s n t b i h l o e M i y a d t t s l l h a e i l emerges. p . d S u t o n n Bacteria begin producing oxygen p l x r i w d e a e no life. Temperatures are . e a c f n " c e e u g v s e g n n l o a r v e n i d i r n e c f n n o e Plants, later animals and possibly earlier i e , v s a u l of Ur, Vaalbara and v i g o Continents a v o t r l i h g a m n r with frequent volcanic e m - o e i extremely hot, s , n m G l ' n r e i b i s n d s r a forms of fungi form around this time. b h o d — s i o t f Kenorland may have existed around s n u e i m s a , h l l r s l s t r n i r o i d c activity and hellish-looking environments a e c a t a n i n u f v a e r p n i p C a "Snowball Earth" periods h " E c e i l m o this time. The atmosphere is i e p s e c 5 t n , i w m e r s i e a s m Possible early oceans or bodies of liquid o t m a e t h , u h n l h f t a t d n i a The early continents of Columbia, Rodinia t n n a h s l a f i f n 4 d o a m s n n e g e o composed of x g a c volcanic and n d t d a a : o e y i e n m t l water. The is formed around this a n s a n Moon l i and Pannotia, in that order, may have s t t w b n t n a e n c e p d h s i i n d c e s w c 0 n c u g r e d n i m e i l m m s a . o r t time probably due to a protoplanet's greenhouse gases existed in this eon. c r n n s c o o h o x e h n u e o u a n n collision into Earth. 1 C d k f G c l f i w e d r i p 500 million years 500 millio0n years Eons are divided into eras, which are in turn divided into periods, epochs and ages -4.5 Phanerozoic Eon billion The ÀUVWHRQZDVWKHHadean, when the Earth had cooled enough for continents and the earliest known life to emerge Earth formed around 4.54 billion years ago, approximately one-third the age of the universe, by accretion from the solar nebula. Timeline of the Phanerozoic Eon M s r P u 0 f a n 4 o o s i : t . t % c o Phanerozoic Eon 1 u 5 Complex life, including vertebrates, begin to dominate the n i n n e 1 o t 9 Earth's ocean in a process known as the Cambrian i o n x i ; explosion. Pangaea forms and later dissolves into d t e e d t d Laurasia and Gondwana, which in turn dissolve into the e c i r g current continents. Gradually, life expands to land and a e n d o o i r h 5 familiar forms of plants, animals and fungi begin t t c e e l h appearing, including annelids, insects and reptiles, hence x t e t v 4 a r e the eon's name, which means "visible life". Several mass r n : e l a extinctions occur, among which birds, the descendants of P i e c s e i – 0 s non-avian dinosaurs, and more recently mammals v E t h s s s t emerge. Modern animals—including humans—evolve at e s . s 1 n u o the most recent phases of this eon t s o f a n o r o i u r o m u e e o i s t T c a h e e c t i d – s a t c h n e n o i t n t e i e p a n , r i i x i t t p C e w d s n n m r e e e e v v h P e e t 100 million years Phanerozoic Eon 65 million the time when multi-cellular life greatly diversiÀHGLQWRDOPRVWDOlWKHRUJDQLVPVNQRZQWRGD\ years 0 t e , . 6 t t n c G n d 6 i a V u e l W Q o Cenozoic e o i v o o r t – Q D d g z t e r e c , n D W . d n n o f h O u ] -500m i n a t n V a t n e a i e o i i S c U d i l t s o , a c M n W À i e d e x a i p m a t c o V g o l i r d h e t u 1 U P c e h t a a s , - e e t ("new life") era n s À 5 n h f i e r s e k i n e r t e P n , t 2 o n a a a a o h e n e x o d s r Phanerozoic Eon t i e e g e E e h d t e n a u m r t n m g h n g c n t J c a n o b e o a w o i l e a n i r n e , i r o g i t f c e h o r e t P l a c t e e o a i i e z r s ] x u h t t d t e a h v i t s f h o t e e d e w i e n t i r D e P c l The Cenozoic ("new life") era began at 66 Ma,[22] and is s t d t [ e ) r e c t s e d ] . – f a s n a e " i d o n e a subdivided into the Paleogene, Neogene, and Quaternary t s s n e 2 o v j r a a i e r l e t d f s p z u a 2 o a i T g i a s [ u l e n e periods. These three periods are further split into seven s i o o h . a e n p a n m m e r o n e a d b i P m e o m s l u subdivisions, with the Paleogene composed of The c h e l r c y n o t d r h l o o M o a e o t ) o e a " r o o e r f Paleocene, Eocene, and Oligocene, the Neogene divided t " w n i c o h ( w f h i 1 t g t t p e t e e T R s o o d f r 5 a c e into the Miocene, Pliocene, and the Quaternary composed l n f t u i , . i t i f n l e t i d i 2 s s o n r C s e o l h c n % of the Pleistocene, and Holocene.[138] Mammals, birds, n L d e e e [ h z c o e l a a e . i e t 5 T a . t e n d r o i h d amphibians, crocodilians, turtles, and lepidosaurs survived c v h o t .