Why do people study rocks?, For fun, To learn about the past, To build houses, To make food, What are sedimentary rocks made of?, Water, Metal, Tiny rock pieces, Fire, Where does sediment often settle?, Mountains, Sky, Low places like lakes, Trees, What happens to layers over time?, They disappear, They melt, They get hard, They fly away, What is a fossil?, A living animal, A plant, A rock tool, Remains of old life, When can fossils form?, When buried quickly, When burned, When frozen in air, When washed away, Where are fossils most often found?, Igneous rocks, Sedimentary rocks, Water, Air, What can fossils show?, Only bones, Only rocks, Only plants, Animal activity, What is absolute dating?, Guessing age, Measuring exact age in years, Counting rocks, Looking at color, What helps scientists find Earth’s age?, Trees, Sand, Meteorites, Water, How old is Earth?, 1 million years, 100 years, 4.6 billion years, 10,000 years

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