Law of Superposition
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Objective
I can explain how the law of superposition helps scientists determine the relative ages of rock layers.
Part 1 of 3
Warm-up video
Unknown Channel · 5:00
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Part 2 of 3
Practice
7 questions
Explain the law of superposition and how it helps scientists understand the relative ages of rock layers.
Imagine you find a rock formation with four layers. From top to bottom, they are: conglomerate, sandstone, shale, and limestone. According to the law of superposition, which layer is likely the oldest? Which is the youngest? Explain your reasoning.
Part 3 of 3
Exit ticket
Quick comprehension check
“In a sequence of undisturbed sedimentary rock layers, which layer is generally the oldest: the top layer, the middle layer, or the bottom layer? According to the law of superposition, is a rock layer found near the surface of the Earth generally younger or older than a rock layer found deeper underground? ”
Sample answer included in the free materials
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