Weathering The disintegration and decomposition of rock at or near Earth’s surface.
Sediments Loose particles created by the weathering and erosion of rock, by chemical precipitation from solution in water, or from the secretions of organisms and transported by water, wind, or glaciers.
Key Concept What is a rock? A rock is any solid mass of mineral or mineral-like matter that occurs naturally as part of our planet.
Key Concept What are the three major types of rocks? Igneous, Sedimentary, and Metamorphic.
Key Concept How do igneous, sedimentary, and metamorphic rocks differ? Igneous rock are formed when magma cools and hardens, Sedimentary rocks are formed when sediments are compacted and cemented, Metamorphic rocks are formed under extreme pressure and temperature conditions.
Key Concept What is the rock cycle? Processes driven by heat from Earth’s interior are responsible for forming both igneous and metamorphic rocks. Weathering and the movement of weathering materials are external processes form sedimentary rocks.
Key Concept What powers Earth’s rock cycle? The energy/heat from the sun powers Earth’s rock cycle.