Geologic Time Scales | Rock Strata | Absolute vs Relative Dating (Middle School Science)

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** WHAT'S COVERED **
1. The Geologic Time Scale
An explanation of how the Geologic Time Scale organises Earth's 4.6 billion-year history.
How the scale is divided into eras, periods, and epochs based on major changes to the planet and its organisms.
2. Rock Strata and Fossils in Understanding Earth's History
How layers of sedimentary rock, known as rock strata, are formed.
The Law of Superposition, which explains that older layers are found beneath younger layers.
The definition of fossils and how different types appear in different rock strata.
The concept and importance of index fossils for dating rock layers.
3. Relative Dating vs Absolute Dating
An explanation of how analysing rock strata and fossils provides relative dates (the sequence of events).
The distinction between relative dates and absolute dates (specific ages in years).
A mention of methods like radioactive decay dating used for absolute dating.

** CHAPTERS **
0:00 Introduction
0:28 What is the Geologic Time Scale?
1:28 Rock Strata and the Law of Superposition
2:30 The Fossil Record and Index Fossils
3:31 Relative vs Absolute Dating


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