geologic time scale

1-4. ENUMERATE THE 4 MAJOR UNITS OF GEOLOGIC TIME SCALES

5. THE EARLIEST EON IS KNOWN AS THE?

• HAYDEE

• HAYDEAN

• HADEE

• HADEAN

6. IT IS RAN FROM 4 BILLION TO 2.5 BILLION YEARS AGO, WERE THE FIRST SIGNS OF LIFE APPEARED.

• ARCHAEN EON

• PROTEZOIC EON

• PHANEROZOIC EON

• NONE OF THESE

7. THIS EONS ,WHEN LIFE REALLY BECAME OBVIOUS?

• PROTEZOIC EON

• ARCHAEAN EON

• PHANEROZOIC EON

• ALL OF THE ABOVE

8. DURING THIS EONS, THE ANAEROBIC LIFE ON EARTH WERE PROBABLY WIPED OUT.

• PROTEZOIC EON

• ARCHAEAN EON

• PHANEROZOIC EON

9. PALEOZOIC ERA IS ALSO KNOWN AS?

• THE AGE OF TODAY

• THE AGE OF MARINE LIFE

• THE AGE OF REPTILES

• THE AGE OF MAMMALS

10. THE AGE OF REPTILES?

• PALEOZOIC ERA

• CENOZOIC ERA

• MESOZOIC ERA

• NONE OF THESE

11.SPECIES OF APE KNOWN AS__________ BECAMETHE FIRST KNOWN PRIMATE TO WALK UPRIGHT?

• SCAHELANTHROPUS

• SCAHELANTROPUS

• SAHELANTHROPUS

• NONE OF THESE

12. IN THIS ERA, THE GIAN FAUNA WENT EXTINT?

• PALEOZOIC ERA

• CENOZOIC ERA

• MESOZOIC ERA

• NONE OF THE ABOVE

13-15. ENUMERATE THE THREE ERAS