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Earth science
| Question | Answer |
|---|---|
| Gravity | the force on our planet that pulls things toward the center of the earth. It's what makes things fall when you let go of them. All planets and stars have this force. |
| Delta | triangular deposit of sediment that forms where a stream enters a large body of water. |
| Compostition | the way in which something is put together from different parts. |
| Glacier | a large, slow- moving mass of ice; nearly 70 percent of the water on earth's surface is stored in huge bodies of ice called glaciers. |
| Mass Wasting | downhill movement of a large mass of rocks or soil due to gravity |
| Landform | a natural feature of the earth's surface. Examples include mountains, valleys, hills and plains. |
| Landslide | a mass of earth, rocks and debris that quickly and suddenly falls down the side of a mountain, cliff, hill |
| Reaction | in chemistry, the change that happens when two or more substances act on each other to form a different substance. |
| Sediment | minerals or organic matter carried and deposited by water or wind that may consolidate into rock. |
| Weathering | a wearing down of rock over time by natural elements like rain, wind and sun. A slow, destructive force that wears down and breaks rock into smaller pieces called sediments. Two types of weathering are mechanical (physical) or chemical. |
| Processes | series of actions or operations that lead to an end result |
| Physical (Mechanical) Weathering | Physical or mechanical weathering is the process of breaking down of rocks and soils through direct contact with atmosspheric conditions such as heat, water, ice and pressure. The compostion of the rock does not change |
| Chemical Weathering | Chemical weathering is a direct effect of atmospheric or biological chemicals in the breakdown of rocks, soil, and minerals |
| erosion | the destructive movement of materials from one place to another by wind, water,ice, and gravity; the movement of small pieces of rock or sediment due to wind, water, gravity and other natural forces |
| Deposition | construtive placement of weathered rock (sediments) and other materials in a new place/location due to water,wind, |
| Destructive Forces | Forces that destroy landforms through erosion and weathering; Examples are gravity, wind, volcanoes, water,ice, earthquakes. Destructice forces can happen slowly (weathering) or quickly (erosion) |
| Constructive forces | forces that build up an existing landform or create a new one through deposition; examples are gravity, wind, volcanoes, earthquakes. Constructive forces happen slowly by deposition |