GEOLOGIC TIME SCALE.notebook                                      January 29, 2020
                      Bellwork: Jan. 29th
                     x Turn in half-life lab
                     x :ork from substitute teacher will NOT be accepted late.
                     x Get out 9.2 	 9.3 reading notes due next Tues
                     x Unit 8 Test postponed until Tuesday.
                      1.  In the half-life lab, why did we use the 
                          data from all 10 groups rather than the 
                          data from Must your group"
                      2.  Explain how radioactive decay is used to 
                          estimate the age of fossils and rocks.
                                         Jan 29-10:04 AM
                          GEOLOGICAL  TIME  SCALE
                                         Jan 20-9:23 AM
                                                                                     1
          GEOLOGIC TIME SCALE.notebook                                                                                         January 29, 2020
                                                        GEOLOGICAL TIME SCALE
                                                                                                          MESOZOIC ERACENOZOIC ERA
                                                                                           PALEOZOIC ERA
                                 HADEAN EON
                                                       ARCHEAN EON PROTEROZOIC EON
                                                                                                     PHANEROZOIC EON
                                                                                                                               0.01
                                                                        2500
                             4500
                                                                                                                       65.5
                                                 3800
                                                                                             570
                                                                                                          245
                                                                            MYA
                                                                        Nov 21-10:02 AM
                                P
                                H
                                A     CENOZOIC ERA                                                    0.01 - 65.5 MYA
                                N
                                E
                                R
                                O
                                Z     MESOZOIC ERA                                                     65.5- 245  MYA
                                O
                                I
                                C
                                E
                                     PALEOZOIC ERA                                                   245-570 MYA
                                O
                                N
                                 PROTEROZOIC EON                                                      570-2500 MYA
                                ARCHEAN HADEAN EON                                                   2500-4600  MYA
                                                          GEOLOGICAL TIME SCALE
                                                                                                      MESOZOIC ERACENOZOIC ERA
                                                                                         PALEOZOIC ERA
                                   HADEAN EON
                                                        ARCHEAN EON PROTEROZOIC EON
                                                                                                  PHANEROZOIC EON
                                                                                                                          0.01
                                                                        2500
                               4500
                                                  3800                                                            65.5
                                                                                           570
                                                                                                      245
                                                                           MYA
                                          A Brief History of Geological Time video
                                                                        Nov 21-10:02 AM
                                                                                                                                                      2
        GEOLOGIC TIME SCALE.notebook                                                                   January 29, 2020
                                   ARCHEAN EON                             2500 -  3800 MYA
                                                                           3800 - 4600 MYA
                                   HADEAN
                                      Hadean Eon
                                      x Earth was as hot as Hades  
                                      x Formation of the Earth
                                      Archean eon
                                      x Greek "origin"
                                      x atmosphere was mostly CO
                                                                        2
                                          st
                                      x 1  life forms flourished 
                                                                                   fossil
                                      x life was anaerobic bacteria
                                         ! didn
t need O 
                                                             2
                                         ! single-celled organisms
                                      x fossils of stromatolites colonies of bacteria
                                                                   living Australia
                                      -
                                            bacteria
                                                           Nov 21-10:16 AM
                              PROTEROZOIC EON                              570-2500 MYA
                                  x Protero - "early"     Zoic - "life"
                                  x Photosynthtic organisms increase the amount of O in the 
                                                                                      2  
                                  atmosphere
                                  x Eukaryotes appear Complex cells
                                  x NO  LIFE ON LAND
                                  x SIMPLE MARINE ORGANISMS ALGAE, FUNGI, :ORMS, 
                                  PLAN.TON
                                  x Few fossils.
                                  x Earth is still HOT Volcanic activity, igneous 	 metamorphic rock 
                                  formation
                                    THE ARCHEAN EON AND PROTEROZOIC EON ARE 
                                    OFTEN REFERRED TO AS THE PRECAMBRIAN.
                                                    What_is_the_PrecaPErian_.asf
                                                           Nov 22-2:22 PM
                                                                                                                          3
         GEOLOGIC TIME SCALE.notebook                                                                                January 29, 2020
                          P
                          H
                          A     CENOZOIC ERA                                                    0.01 - 65.5 MYA
                          N
                          E
                          R
                          O
                          Z
                                MESOZOIC ERA                                                     65.5- 245  MYA
                          O
                          I
                          C
                          E
                               PALEOZOIC ERA                                                   245-570 MYA
                          O
                          N
                                                                                n
                                                                                a
                                                                                i
                                                                                r
                          PROTEROZOIC EON                                                       570-2500 MYA
                                                                                b
                                                                                m
                                                                                a
                                                                                c
                                                                                e
                          ARCHEAN HADEAN EON                                   r               2500-4600  MYA
                                                                                P
                                                    GEOLOGICAL TIME SCALE
                                                                                                MESOZOIC ERACENOZOIC ERA
                                                                                   PALEOZOIC ERA
                             HADEAN EON
                                                  ARCHEAN EON PROTEROZOIC EON
                                                                                            PHANEROZOIC EON
                                                                                                                    0.01
                         4500                                     2500
                                                                                                             65.5
                                            3800
                                                                                     570
                                                                                                245
                                                                     MYA
                                                                  Nov 21-10:02 AM
                              PHANEROZOIC  EON                            570 TO 0.01  MYA
                              What_is_the_Phanerozoic_Eon_.asf
                                              0.01 MYA
                                                                      CENOZOIC ERA
                                                                        What_is_the_Cenozoic_Era_.asf
                           PHANEROZOIC
                                                                      MESOZOIC ERA
                                    EON
                                                                       What_is_the_Mesozoic_Era_.asf
                           "visible life"
                                             570 MYA
                                                                       PALEOZOIC ERA
                                                                       What_is_the_Paleozoic_Era_.asf
                                                                   Nov 22-2:22 PM
                                                                                                                                           4