Surface changes - PowerPoint PPT Presentation

Plate Tectonics

Plate Tectonics. The earth in motion. Earth’s Interior. Science of Geology Studying surface changes Constructive forces Build up mountains and land masses Destructive forces Wear away mountains and other surface features Wind, water, and waves Finding indirect evidence Seismic waves.

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342 views • 22 slides

VOLCANOES

VOLCANOES. YEAR 7. 3. VOLCANIC ACTIVITY. Lava begins as magma, formed in the asthenosphere . It rises toward the surface, into any cracks in the rock above. The gases form bubbles. When an opening develops in weak rock on the surface, a volcano erupts.

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247 views • 12 slides

Metamorphic Rocks

Metamorphic Rocks. Inside Earth Chapter 5.5 Pages 162-164. Formation of Metamorphic Rocks. Heat and Pressure deep beneath Earth’s surface changes rock Temperatures of 200⁰ C, Pressure of 300MPa. Formation of Metamorphic Rocks. Rocks change in… Appearance Texture Crystal structure

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505 views • 9 slides

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