Geologic Time Scale Main Idea

Task 1: Answer the questions below. What is the geologic time scale? When we use major events or changes to describe the history of Earth the smallest piece of time used to describe Earth's history when we use exact groups of years to describe Earth's history Match the division of time with the correct description. Era The 2nd biggest unit of time used to describe Earth's history Period The 3rd biggest unit of time used to describe Earth's history Eon The biggest unit of time used to describe Earth's history Epoch The smallest unit of time used to describe Earth's history Task 2: Watch the video introduction to "Geologic Time Scale" and answer the review questions below. What is the objective of the video? To learn the different eras and periods on the geologic time scale According to the video, how long ago did Earth form? 4.6 million years ago 4.6 billion years ago The geologic time scale is divided into intervals based on events that have occurred. The time period from 4.6 billion years ago to 570 million years is called the _. Paleozoic Precambrian Cenozoic Mesozoic The Paleozoic era is divided into _ periods. 3 4 5 6 The mesozoic era, also know as "The Age of Reptiles," began 252 million years ago and lasted until 66 million years ago. Which era is is known as "The Age of the Mammals," and the current era? Paleozoic Mesozoic Cenozoic Do all eras last for the same amount of time? yes no Math & Science Games For Teachers & Students Click on the link to play the game! Task 3: Mission Expedition- Play the game and dig your way through Earth's Geologic History.