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Science Terms
8th grade science
| Term | Definition |
|---|---|
| The Rock Cycle | The continuous changed cycle as they formed formation |
| Weathering | The is breaking down or dissolving of rocks and minerals on Earth's surface. |
| Erosion | The process that moves soil or rock from one place to another. Also a type of Weathering |
| Sediments | The particles of matter |
| Deposits | To leave an amount of something overtime |
| Organic | of, relating to, or derived from living matter |
| Fossils | Organic. The remains from an organic organism preserved in rock. |
| Fossils in Sedimentary Rocks | Most commonly found. The rocks form at temperatures and pressures that do not destroy fossil remnants. |
| Fossils in Igneous Rocks | Not as common because they are formed from hot lava or magma and they would just burn up or destroy. |
| Law of Superstition | Oldest rocks are on the bottom |
| Theory of Plate Tectonics | The earths crust and upper mantle are broken into sections called plates. They float on the mantle and move slowly |
| Theory of Continental Drift | The gradual movement of continents across the earth |
| Alfred Wagner | Proposed the continental drift in 1912 |
| Uniformitarianism | Assumption that all scientific laws have been the same throughout time |
| Sea Floor Spreading | The Spreading of the sea floor from molten rock |
| What Causes Plate Tectonic Movement | Convection of heat from the core of the earth to the plate. |
| Types of Heat | Conduction, Convection, Radiation |
| Conduction | Transfer of heat of something that is touching |
| Convection | The movement of heat from liquids to gases |
| Radiation | Movement of heat without matter |
| Structure of the Earth | The earth is made up of 3 main layers: -Core -Mantle -Crust |
| Lithosphere | Made up of the crust and upper part of the mantle. Tectonic Plates are made up of this. |
| Plate Boundaries | 3 Types: Divergent Convergent Transform |
| Divergent Boundaries | Pulling apart Ex. Mid Atlantic Ridge |
| Convergent Boundary | Going together Ex. Himalayas |
| Transform Boundary | Where Plates Slide past each other Ex. San Andreas Fault |
| Subduction | When two plates meet one goes under creating a volcano |
| Ring of Fire | A circle of plate boundaries there is volcanoes (Circles the Pacific Plates) |
| Hot Spots | A hot mantle breach in the middle of the tectonic plates |
Created by:
A-mac
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