1) What is the geologic time scale? a) A tool for measuring earthquakes b) A timeline of Earth’s history divided into eras, periods, and epochs c) A calendar used for studying the stars d) A method to determine the age of fossils 2) Which era is known as the "Age of Dinosaurs"? a) Paleozoic b) Mesozoic c) Cenozoic d) Precambrian 3) What is the longest time division on the geologic time scale? a) Epoch b) Period c) Era d) Eon 4) During which era did the first land plants and animals appear? a) Precambrian b) Paleozoic c) Mesozoic d) Cenozoic 5) What marks the end of the Mesozoic era? a) The emergence of humans b) The extinction of the dinosaurs c) The formation of Earth’s first oceans d) The beginning of the Ice Age 6) Which period is part of the Cenozoic era? a) Jurassic b) Cambrian c) Quaternary d) Devonian 7) What major event occurred during the Precambrian time? a) Dinosaurs ruled the Earth b) Formation of Earth’s crust and first life forms c) Ice Age began d) First humans appeared 8) Which event allowed mammals to dominate during the Cenozoic era? a) Mass extinction at the end of the Paleozoic b) The extinction of dinosaurs at the end of the Mesozoic c) Formation of large landmasses d) Development of flowering plants 9) Which is the correct order of geologic time divisions, from largest to smallest? a) Period → Era → Epoch → Eon b) Eon → Era → Period → Epoch c) Era → Eon → Epoch → Period d) Epoch → Period → Era → Eon 10) The Cambrian Explosion refers to what event in Earth’s history? a) A meteor impact that killed the dinosaurs b) B. The sudden appearance of most major animal groups in the fossil record c) C. The creation of Earth’s first atmosphere d) D. The extinction of most marine species

Geologic Time Scale Quiz

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