Layers of the Earth Teacher Resources
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How Old is it Really? - How Do We Know that the Earth is 4.6 Billion Years Old?
9th - 12th
Eight neat slides lead to the understanding of how geologists have determined Earth's age. Most of the slides are dedicated to explaining the absolute dating method of assessment. Color diagrams display radioactive isotopes and a graph...
Layers and Laws: The Law of Superposition and Index Fossils
6th - 8th CCSS: Adaptable
What can layers of rock teach us about the climate? Young scientists solve a mystery about who stole a cookie by applying the law of superposition. Then, they apply the same concept to solve a more difficult mystery, trying to determine...