The History of Life on Earth

The largest division of the geologic time scale is the _______.

• Eon

• Era

• Period

• Epoch

The Mesozoic Era was the Age of Reptiles while the current Cenozoic Era is the Age of ________.

• mammals

• birds

• humans

• technology

The layers in sedimentary rocks are also called _______.

• eras

• epoch

• gaps

• strata

The movie “Jurassic Park” got its title from which era?

• Paleozoic

• Mesozoic

• Cenozoic

• Holozoic

During which era were the first land plants formed?

• Cambrian

• Pre-cambrian

• Paleozoic

• Holozoic

The era of middle life was a time of many changes on Earth.

• Mesozoic

• Pre-cambrian

• Paleozoic

• Holozoic

What is the longest part of Earth’s history where trace fossils appeared?

• Mesozoic

• Pre-cambrian

• Paleozoic

• Holozoic

The geologic time scale is subdivided into 4 groups. List them

from the largest to the smallest

• Eons, periods, epochs, eras

• Eras, eons, periods, epochs

• Epochs, periods, eras, eons

• Eons, eras, periods, epochs

The end of this era was believed to be caused by a comet or asteroid colliding with Earth, causing a huge cl asteroid colliding with Earth, causing a huge cloud of dust and of dust and smoke to rise into the atmosphere, blocking out the sun.

• Paleozoic

• Holozoic

• Mesozoic

• Cenozoic

Which geologic event occurred during the Mesozoic era?

• Pangaea formed

• Asteroids killed the dinosaurs

• The Rocky Mountains formed

• The Pleistocene Ice Age began