Scale Of Geologic Time Question Preview (ID: 56801)
Use Your Knowledge Of Earth Science To Answer All Questions In The Data Set. You Will Need Your Earth Science Reference Tables And A Calculator To Answer Some Of The Questions. Good Luck.
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Approximately 2.2 billion years ago, which gas was first added in large amounts to Earth’s atmosphere from life-forms that evolved in the oceans?
a) carbon dioxide
b) water vapor
c) oxygen
d) nitrogen
Antarctica's location and climate changed over the last 200 million years because Antarctica moved
a) southward, resulting in a warmer climate
b) southward, resulting in a colder climate
c) northward, resulting in a warmer climate
d) northward, resulting in a colder climate
Which series of events took the least amount of time to complete?
a) A
b) B
c) C
d) D
Which life-forms were living on Earth when India was at position A?
a) humans
b) dinosaurs
c) trilobites
d) armored fishes
Which graph shows the relative duration of geologic time for the Precambrian, Paleozoic, Mesozoic, and Cenozoic time intervals?
a) A
b) B
c) C
d) D
What is the estimated age of Earth?
a) 4.6 × 10^6 years
b) 4.6 × 10^7 years
c) 4.6 × 10^8 years
d) 4.6 × 10^9 years
Trilobite fossils were recently discovered in Himalayan Mountain bedrock. During which geologic period could these organisms have lived?
a) Neogene
b) Cretaceous
c) Triassic
d) Cambrian
What percentage of Earth's history represents human existence?
a) less than 1.0%
b) 1.8%
c) 23.5%
d) more than 98.6%
Which number best represents when humans are inferred to have first appeared on Earth?
a) 1
b) 2
c) 3
d) 4
Geologists have subdivided geologic time into units based on
a) rock type
b) fossil evidence
c) erosion rates
d) landscape development
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