Geologic Timeline Quiz

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Yay! Above, the "Carolina Butcher," Carnufex carolinensis, a newly discovered crocodilian ancestor that lived in North Carolina. Not only could it rend your delicate flesh with blade-like teeth, it was quite agile and would terrify you first by standing up on two legs and chasing you at a relatively fast pace. That's just wrong. Fortunately, you know the dinosaurs only lived in the Mesozoic Era and you and all the other humans didn'y show up until millions of years later in the late Cenozoic Era. You're safe.

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1. What is the shortest division of time in the geologic time scale?

an epoch

a period

an era

an eon

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2. What era of geologic time ended with the largest extinction event in Earth history?

the Cenozoic

the Cretaceous

the Paleozoic

the Mesozoic

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3. Which time period saw the first life on earth?

Cambrian period

Hadeon era

Archeozoic era

Proterozoic era

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4. What is the current epoch?

Cenozoic

Holocene

Quarternary

Phanerzoic

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5. When did mammals first appear?

Ordovician

Triassic

Paleogene

Cretaceous

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6. What is the usual reason we draw a line to end a section of time on the geologic timescale?

Mass extinction event

Geologic anomaly

Global warming period

Magnetic field reversal

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7. What major development occurred during the Proterozoic Era?

the first appearance of organisms with hard parts

first oxygen exhaling organisms

build up of free oxygen in the atmosphere

mammals

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8. What marked the end of the Mesozoic Period?

the extinction of many marine invertebrates

the extinction of the dinosaurs

the building of the Appalachians ends

mammals are abundant

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9. What is the basic cause of most all mass extinction of species over time?

Human interference

Climate change

Animals destroy each other

Lack of biodiversity

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10. The sudden appearance of a great diversity of organisms occurred during the "__________ Explosion."

Hadeon

Cenozoic

Permian

Cambrian

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11. The dominant life form during the Mesozoic Era was

Insects

Mammals

Amphibians

Dinosaurs

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12. Put the following units of time in order from the longest to shortest.

Periods, eras, epochs, eons

Eras, eons, epoch, periods

Eons, eras, periods, epochs

Epochs, periods, eons, eras

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13. Geologists are reasonably convinced that Earth is:

4,500,000,000,000 yrs. old

4,500,000,000 yrs. old

450,000,000 yrs. old

45,000,000 yrs.old

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14. The Phanerozoic does not include the

Precambrian

Paleozoic

Mesozoic

Cenozoic

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15. The Paleozoic Era began about ______ million years ago.

251

540

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16. Early humans existed at the same time as dinosaurs.

True

False

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17. Vascular land plants appeared during the ___period

Cambrian

Silurian

Carboniferous

Triassic

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18. T-Rex, flowers, and bees all appeared during the

Triassic

Jurassic

Cretaceous

Paleogene

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19. A group of creatures that were a transition between between the reptiles and mammals were the

Therapsids

Prosimians

Hominids

Eohippus

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