| A | B |
|---|
| core | innermost part of Earth that has two parts: inner core which is liquid and outer core which is liquid and solid |
| mantle | middle part of Earth which is about 2900 km thick and has liquidy and putty like features |
| crust | the layer of Earth that is rock based and 5- 40 km thick |
| earthquake | vibration or shaking caused by movement and pressure within Earth |
| fault | fracture along which rocks move |
| seismograph | instrument to measure intensity of shock waves |
| tsunami | huge sea waves caused by earthquakes |
| volcano | opening in Earth's crust through which lava flows |
| lava | magma that flows from volcanoes |
| shield volcano | broad volcano with gently sloping sides like Mauna Loa in Hawaii |
| vent | hole through which lava and magma flow through a volcano |
| cinder cone volcano | volcano with very steep sides that form from pieces of lava that have blown out of the vent |
| composite cone volcanoes | volcano made from both lava flows and cinders like Mount Saint Helens |
