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bảng tínhThe Paleozoic era
Total câu hỏi: 11
Worksheet time: 6mins
The Paleozoic era is the ــــــــــــــــــــ era in the Phanerozoic eon.
oldest
Youngest
Smallest
Shortest
which two period make up the middle Paleozoic?
Cambrian and Permian
Silurian and carboniferous
Silurian and Devonian
Cambrian and Ordovician
the Paleozoic era ended with ______ .
The biggest party ever
The largest mass extinction in Earths history
a mass extinction
Cambrian explosion
periods are subdivided into ـــــــــــــ .
eons
epochs
eras
hours
which of the following did not happen in late Paleozoic?
amphibians disappeared
amphibians evolved
reptiles appeared
coal swamps formed
in which period did coal swamps form?
cambrian
Silurian
Devonian
carboniferous
how many mass extinction occurred till now?
9
6
4
5
none
what marked the end of the Precambrian period and the beginning of the Paleozoic era?
A mass extinction
A volcanic eruption
The Cambrian explosion
An Earthquake
The Paleozoic began how many years ago?
540 years ago
251 billion years ago
542 billion years ago
499 million year ago
542 million years ago
The early Paleozoic was called the age of _______ .
vertebrates
invertebrates
fishes
reptiles
amphibians
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