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Stack #4507746
| Question | Answer |
|---|---|
| mineral | A natural, usually inorganic solid that has a characteristic chemical composition and an structure. |
| element | A substance that cannot be separated or broken down into simpler substances by chemical means; all atoms of an element have the same atomic number. |
| atom | The smallest unit of an element that maintains the properties of that element. |
| compound | A substance made up of atoms or iron of two or more different elements joined by chemical bonds. |
| matter | Anything that has mass and takes up space. |
| crystal | Natural solid substance that has a definite geometric shape. |
| luster | The way in which a mineral reflects light. |
| streak | The color of a mineral in powered form. |
| cleavage | In geology, the tendency of a mineral to split a long specific planes of weakness to form smooth, flat surfaces. |
| weathering | The natural process by which atmospheric and environmental agents, such as wind, rain, and temperature changes, disintegrate and decompose rocks. |
| erosion | The process by which wind, water, ice, or gravity transports soil and sediment from one location to another. |
| deposition | The process in which material is laid down.(Earth science) The change of state from gas directly to a solid.(physical science) |
| igneous rock | Rock that when magma cools and solidifies. |
| sedimentary rock | A rock that forms from compressed or cemented layers of sediment. |
| metamorphic rock | A rock that forms from other rocks as a result of intense heat, pressure, or chemical processes. |
| rock cycle | The series of processes in which rock forms, changes from one type to another, is destroyed, and forms again by geologic processes. |
| uplift | The rising of regions of the Earth's crust to higher elevations. |
| subsidence | The sinking or regions of the Earth's crust to lower elevations. |
| rift zone | An area of deep cracks that forms between two tectonic plates that are pulling away from each other. |
| crust | The thin and solid outermost layer of Earth above the mantle. |
| mantle | The layer of rock between the Earth's crust and core. |
| convection | The movement of matter due to differences in density; the transfer of energy due to the movement of matter. |
| core | The central part of Earth below the mantle. |
| lithosphere | The solid, outer layers of Earth that consists of the crust and the rigid upper part of the mantle. |
| athenosphere | The soft layer of the mantle on which the tectonic plates move. |
| mesosphere | 1. The strong, lower part of the mantle between the asthenosphere and the outer core, 2. The layer of the atmosphere between the stratosphere and the thermosphere and in which temperature decreases as altitude decreases. |
| sea-floor spreading | The process by which new oceanic lithosphere (sea floor) forms when magma rises to Earth's |
| plate tectonics | The theory that explains how large pieces of the lithosphere, called plates, move and change shape. |
| tectonic plate | A block of lithosphere that consists of the crust and the rigid, outermost part of the mantle. |
| convergent boundary | The boundary between tectonic plates that are colliding. |
| divergent boundary | The boundary that are moving away from each other. |
| transform boundary | The boundary between tectonic plates that are sliding past each other horizontally. |
| deformation | The bending, tilting, and breaking of Earth's crust; the change in the shape of rock in response to stress. |
| folding | The bending of rock layers due to stress. |
| fault | A break in a body of rock along which one block moves relative to another. |
| epicenter | The point on Earth's surface directly above an Earthquake's starting point, or focus. |
| tectonic plate boundary | The edge between two or more plates classified as divergent, convergent, or transform by the movement taking place between the plates. |
| elastic rebound | The sudden return of elastically deformed rock to its undeformed shape. |
| volcano | A vent or fissure in Earth's surface through which magma and glases are expelled. |
| magma | The molten or partially molten rock material containing trapped gases produced under the Earth's surface. |
| lava | Magma that flows onto Earth's surface; the rock that forms when lava cools and solidifies. |
| vent | An opening at the surface of the Earth through which volcanic material passes. |
| hot spot | A volcanically active area of Earth's surface; commonly far from a tectonic plate boundary. |
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