| A | B |
|---|
| fresh water | 3% of all water on earth |
| Richter Scale | Used by scientists to measure the energy released by earthquakes |
| Core | The earth's center, made of dense elements |
| lava | Magma, once it reaches the surface of the earth |
| tributaries | small streams or rivers |
| tsunamis | giant waves caused by earthquakes and undersea landslides |
| Ring of Fire | This area contains 75% of the world's active volcanoes |
| Northern lights | Seen in the skies near the North Pole |
| crust | The top, thin layer of the earth. |
| fault | Breaks or cracks in the earth's surface. |
| atmosphere | The mixture of gases that make up the air we breathe. |
| erosion | The removal of dirt, soil, rocks by wind or water |
| Geosphere | Layer of the earth made of rocks and minerals |
