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the earth
science yrly revision
Term | Definition |
---|---|
density | a measurement of the amount of matter an object has |
igneous | igneous rocks are formed when magma cools and makes crystals. |
metamorphic | metamorphic rocks are formed when rocky material experiences intense heat and pressure under the crust of the earth. |
sedimentary | sedimentary rocks are little rocks that form together when lots of other rocks break into fragments and collect together over thousands of years: limestone sandstone |
erosion | wearing away exposed surfaces by agents such as wind, moving water and ice. these agents usually contain weathered rock debris. |
weathering | the process which rocks are broken down by chemical and/or physical change into smaller particles. |
deposition | the placement of new soil or sediment on new ground |
super position | super position is when younger sedimentary rock layers are found atop older sedimentary layers |
fossilization | the process in which an animal or plant is covered in sediment and becomes preserved in a hard form. |
lithosphere | the part of the earth that is made up of the crust and upper mantle. |