| A | B |
|---|
| Erosion | wearing away of land |
| Rock weathering | process thaqt breaks up rocks and causes them to decay |
| Sediment | the smaller particles that weathering breaks rocks into |
| Glaciers | thick masses of ice that glide slowly across the planet's surface |
| Dunes | hills of wind-deposited sand |
| Lava | the melted liquid rock that spills out onto the earth's surface |
| Volcano | the opening in the earth's crust through which the magma flows |
| Fold | caused by rock layers bending |
| Fault | caused by rock layers breaking and moving |
| Earthquakes | shock waves, or vibrations cuased by movement along a fault |
| landforms | the shapes on earth's surface |
| plains | nearly flat areas |
| plateaus | elevated flat lands |
| mid-ocean ridge | chain of mountains on the ocean floor |
| abyssal plains | large flat areas on the ocean floor |
| subduction | when plates collide and the heavier plate sinks under the other |
| trench | long valley on the ocean floor |
| flood plain | landform of level ground built by sediment deposited by a river |
| alluvial fan | deposit of eroded sentiment at the base of a mountain |
| delta | mud or sand eroded from an alluvial fan to the mouth of a river |
| irrigation | watering of land through pipes or canals |
| industrialization | large-scale manufacturing of goods using machine power |
| hydroelectricity | water produces power |
| hydrologic cycle | circulation of water among the parts of the hydrosphere |
| transpiration | when plants give off water vapor |
| headwaters | first, smallest streams to form from runoff |
| tributary | smaller river flowing into a larger river |
| watershed | area of land drained by a river |
| estuary | where rivers meet the sea |
| lake | depression inland filled with water |
| wetlands | areas inland that flood part of the year |
| groundwater | water found below the earth's surface |
| water table | where an underground water source begins |
| continental shelf | shallowest part of the ocean |
| Mariana Trench | deepest point in the Pacific Ocean |
