Geologic Time Scale Happenings: Question Preview (ID: 5940)

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During which era did the supercontinent Pangaea began to break up?
a) Mesozoic
b) Paleozoic
c) Precambrian
d) Cenozoic

The current geologic period is called the ____.
a) Quaternary
b) Tertiary
c) Mesozoic
d) Silurian

What event may have triggered the great Paleozoic (Permain) extinction?
a) climatic change
b) changes in Earth's orbit
c) meteorite strike
d) heightened solar activity

What happened to all the continents by the end of the Permain Period?
a) They fused into Pangaea.
b) They formed Gondwana.
c) They split in half.
d) They moved toward the poles.

Mammals became dominant only after ____.
a) dinosaurs became extinct
b) the Cenozoic Era ended
c) continental glaciers retreated
d) inland seas dried up

One group of reptiles, characterized by the fossil Archaeopteryx, led to the evolution of ____
a) birds
b) dinosaurs
c) cephalopods
d) mammals

In the early Paleozoic, life was only found in/on the ____.
a) seas
b) islands
c) air
d) islands

Why did amphibians diversify so rapidly during the late Paleozoic?
a) They had little competition from other land dwellers.
b) They were excellent hunters.
c) They adapted to the cold climate.
d) They could breathe underwater.

Which period is known as the “age of fishes”?
a) Devonian
b) Jurassic
c) Permian
d) Mississippian

Which of the following was NOT one of the changes in development and specialization that primitive mammals underwent?
a) increase in stomach capacity
b) specialization of teeth
c) increase in brain capacity
d) increase in size

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