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Age of Rocks

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A series of free Science Lessons for 7th Grade and 8th Grade, KS3 and Checkpoint Science in preparation for GCSE and IGCSE Science.

Varve Layers and Annual Couplets
Varve layers are annual layer of sediment or sedimentary rock deposited from seasonal variation in clastic, biological, and chemical sedimentary processes.

How Does Radiocarbon Dating Work?
How do scientists determine the age of fossils that have been under the surface of the earth for thousands of years?

Rotate to landscape screen format on a mobile phone or small tablet to use the Mathway widget, a free math problem solver that answers your questions with step-by-step explanations.

You can use the free Mathway calculator and problem solver below to practice Algebra or other math topics. Try the given examples, or type in your own problem and check your answer with the step-by-step explanations.

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