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Greenfield- Rocks
Rock Formation and Classification Forces that Shape the Earth
Term | Definition |
---|---|
Crystalization | the gradual formation of crystals in a definite arranged order |
Deposition | the dropping of rock particles and sediment that have been weathered and eroded by water, wind, or ice |
Erosion | the picking up and carrying away of weathered rock and soil. It is the slow wearing away of Earth's surface |
Weathering | the process by which rocks are broken and worn down into smaller pieces by wind, water, glaciers (ice), plants, chemicals, or animals |
Magma | A body of molten rock found beneath the earths crust |
Metamorphic Rock | rock formed by the transformation of pre-existing rock deep within the earth( but still in a solid state) by heat, pressure, and/or chemically active fluids |
Metamorphism | structural and mineralogical changes of any type of solid rock in response to physical and chemical conditions different from those under which the rocks initially formed |
Plate tectonics | the theory which proposes that earth's outer shell consists of individual plates which interact in various ways |
Sedimentary Rock | sediments of old rock that mix with clay, sand or gravel and become compacted and cemented together |
Rock cycle | a model that illustrates the origin of the three basic rock types |
Sediment | broken pieces of old rock that have become smaller and rounder over time as they are transported by wind and water |
Lava | the molten rock that is expelled or shot out of a volcano during an eruption and reaches Earth's surface |
Extrusive Igneous Rock | rock formed from the eruption of volcanoes which cool and solidify above ground |
Intrusive Igneous Rock | when magma cools and solidifies below ground, these types of rocks are formed |
Igneous Rock | rock formed when melted rock cools and solidifies |
Mohs Hardness Scale | it determines the hardness of minerals. |
Cleavage | this is when a mineral splits along flat surfaces. |
Geologist | a scientist that studies rocks and minerals. |
Streak | it is the color displayed of a mineral when it is in a powdered from. |
Luster | a property of a mineral that describes how shiny the mineral is. |
Mineral | a naturally occurring substance that is nonliving (non-organic)and is the building block of rocks. |
Rock | a naturally occurring solid that is made of two or more minerals. |