Across
- 2. The materials that soil forms from
- 4. rock that forms on earth's surface made up of tightly packed sediments
- 7. molten rock and gas found under the earth's surface
- 9. outward expansion of urbanization into rural areas
Down
- 1. an existing rock that has been morphed by high heat, pressure, or hot liquid deep in the earth
- 3. solid material that can be moved through erosion
- 5. relatively few people and large areas of open space
- 6. when molten lava or magma cools and forms a solid
- 8. An area with over 2'500 people and some sort of city government