Earth History

How do we know the Earth has changed?

Earthquakes

What is and earthquake? What is a fault? What is the focus of an earthquake? What is the epicenter of an earthquake? What is a seismograph used for?

What causes earthquakes?

Volcanoes

What is a volcano? What is magma? What is lava? What is a crater? What are tectonic plates? What is a magma chamber?

Rock Cycle

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