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Which graph shows the relative duration of geologic time for the Precambrian, Paleozoic, Mesozoic, and Cenozoic time intervals?
dinosaurs
southward, resulting in a colder climate
4
4.6 × 10^9 years
B
C
Cambrian
less than 1.0%
Which number best represents when humans are inferred to have first appeared on Earth?
dinosaurs
southward, resulting in a colder climate
4
4.6 × 10^9 years
B
C
Cambrian
less than 1.0%
Which series of events took the least amount of time to complete?
dinosaurs
southward, resulting in a colder climate
4
4.6 × 10^9 years
B
C
Cambrian
less than 1.0%
What is the estimated age of Earth?
dinosaurs
southward, resulting in a colder climate
4
4.6 × 10^9 years
B
C
Cambrian
less than 1.0%
Which life-forms were living on Earth when India was at position A?
dinosaurs
southward, resulting in a colder climate
4
4.6 × 10^9 years
B
C
Cambrian
less than 1.0%
Trilobite fossils were recently discovered in Himalayan Mountain bedrock. During which geologic period could these organisms have lived?
dinosaurs
southward, resulting in a colder climate
4
4.6 × 10^9 years
B
C
Cambrian
less than 1.0%
What percentage of Earth's history represents human existence?
dinosaurs
southward, resulting in a colder climate
4
4.6 × 10^9 years
B
C
Cambrian
less than 1.0%
Antarctica's location and climate changed over the last 200 million years because Antarctica moved
dinosaurs
southward, resulting in a colder climate
4
4.6 × 10^9 years
B
C
Cambrian
less than 1.0%
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