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Description
Flashcards by Armaan Bansal, updated more than 1 year ago
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Created by Armaan Bansal
about 2 years ago
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| Question | Answer |
| Shields | area of very old rock that used to be ancient mountains but have worn down over time. |
| Valleys | reas of low land in between higher land, often created by water or glaciers wearing down the land. |
| Plateaus | lat, raised up land, similar to plains, often between mountains |
| Plains | large areas of flat land at low elevations. Often these areas used to be the bottom of ancient oceans. |
| Mountains | areas of high land that rise above surrounding land, formed by converging crusts (ex. Fold Mountains) or by volcanoes (lava escaping, piling up, then cooling). |
| Water erosion (one of the three types of erosion that can change landforms) | rain, waves, rivers |
| Ice erosion (one of the three types of erosion that can change landforms) | glaciers |
| Wind erosion(one of the three types of erosion that can change landforms) | hurricanes, tornadoes |
| What is the lithosphere | the layer of solid rock that we stand on, made up of the crust and upper mantle |
| What is the asthenosphere | the semi-liquid layer of melted rock under the Earth’s surface, which causes the plates to move |
| Convergent | towards each other |
| Divergent | away from each other |
| Transform | grind against each other |
| How do earthquakes occur? explain | Earthquakes can happen at convergent plate boundaries, when plate subduction happens. One plate will be under pressure as it gets stuck and has limited space to move, and when this plate “slips” or unsticks, it releases the pressure which shakes Earth’s plates. This can also happen at a transform boundary. |
| What process causes the plates to move? How does this work? | Convection flow. This process is when hot fluid material rises then cools down near the Earth’s surface, and then is replaced by more hot material, creating a circular motion. |
| What happens when an oceanic plate meets a continental plate | The oceanic plate, which is thicker and heavier, will slide underneath the continental plate, called plate subduction. |
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