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Geologic Time Scale: 10 cm, calendar, clock

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How old is Earth? How big is 1 million years compared to 1 billion years? Students will use three models to organize geologic time and practice cross multiplication to solve for a variable.

Lesson Grade Level

8th Grade

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A lesson to teach students how to collect, organize, interpret data, make inferences, raise awareness, and suggest possible solutions on the water quality of the waterbodies in the state of Arizona.

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This lesson allows students to explore why volcanoes are shaped differently and why they erupt differently. Students will investigate viscosity, silica content of igneous rock samples, and perform