|  
 
|  |  |   
| 2 | frozen rain drops |   
| 4 | an imaginary center line around which the Earth rotates |   
| 5 | an opening in the Earth's crust from which steam, lava, and ashes erupt. |   
| 8 | the outermost layer of Earth |   
| 10 | formed when sediments are layers, squeezed, and cemented together |   
| 11 | the changing of a liquid into a gas |   
| 12 | formed when lava or magma cools and hardens |   
| 13 | water leaving the cloud as rain, snow, sleet, or hail |   
| 18 | the changing of a gas to a liquid |   
| 19 | a tool use to measure wind speed |   
| 21 | the shaking of the Earth's surface caused by the release of energy along a fault |   
|  |  |  
 
|  |  |   
| 1 | one full orbit of an object around another object |   
| 3 | a tool used to measure air pressure |   
| 4 | the layer of gases that surround Earth and other planets |   
| 6 | the path that water takes as it evaporates, condenses, falls to Earth, and evaporates |   
| 7 | the process that breaks down rocks |   
| 9 | is formed when existing rock is heated at high pressures and temperatures |   
| 14 | the center part of Earth |   
| 15 | the layer of Earth between the crust and the core |   
| 16 | one whole spin of the Earth on its axis |   
| 17 | the average of weather conditions over a long period of time |   
| 20 | the movement of sediment away from one place |   
|  |  |