We live in the period called the

We live in the period called the
 a. Cenozoic.
  b. Holocene.
  c. Ordovician.
  d. Quaternary.

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[Ques. 2] The Paleozoic era ended with an event called the
 a. Chicxulub Impact.
  b. Cambrian Explosion.
  c. Great Dying.
  d. Pangaean Rift.

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[Ques. 3] Trilobites lived during which era?
 a. Paleozoic
  b. Cenozoic
  c. Mesozoic
  d. Archeozoic

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[Ques. 4] The first 87 of geologic time is often called
 a. Hadean time.
  b. Pangaean time.
  c. Precambrian time.
  d. Proterozoic time.

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[Ques. 5] The Cenozoic era began about how many million years ago?
 a. 65
  b. 545
  c. 3
  d. 245

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[Ques. 6] The Mesozoic era began about how many million years ago?
 a. 3
  b. 545
  c. 245
  d. 65

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[Ques. 7] The Paleozoic era began about how many million years ago?
 a. 65
  b. 545
  c. 245
  d. 3

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[Ques. 8] The term Cambrian explosion refers to
 a. an asteroid impact.
  b. the breakup of a supercontinent.
  c. intense, widespread volcanic activity.
  d. a proliferation of life forms.

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[Ques. 9] Which of the following eons is the oldest?
 a. Proterozoic
  b. Phanerozoic
  c. Hadean
  d. Archean

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[Ques. 10] In which of the following eons do we live?
 a. Phanerozoic
  b. Hadean
  c. Proterozoic
  d. Archean