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What are hard pieces of the earth's surface Rocks
How are rocks classified? form
What is an opening in the earth that allows the hot, melted rock inside to come to the surface ? volcano
What is any part or mark of a living thing that is naturally preserved after it dies? fossil
What are solid materials in nature that were never alive? minerals
What are minerals identified by? hardness, crystal shape, color and streak
The surface of the earth is always ___. changing
The breaking down of rocks is called ___. weathering
_____ are the remains of living things that have died and decayed Humus
What is the layer that is solid, unbroken rock? Bedrock
What is the second layer of soil that does not contain humus? Subsoil
What is the layer of soil where plants grow and contains humus? Topsoil
What forms when layers of sediment are pressed together and harden? Sedimentary rock
What forms when hot, melted rock cools? Igneous rock
What forms when igneous or sedimentary rocks are changed by great heat and pressure? Metamorphic rock
Created by: msantis