Mountains

2. lava
4. a measurement of distance, going up
5. landform that rises prominently above its surroundings, generally exhibiting steep slopes, a relatively confined summit area, and considerable local relief
7. the portions of the landmass that lie south of the Isthmus of Panama
9. land area consisting of Europe and Asia
11. the second largest of the continents, on the Mediterranean in the north, the Atlantic in the west, and the Red Sea, Gulf of Aden, and Indian Ocean in the east
13. a continent containing the United States, Canada, Greenland, Mexico, and Central America
14. hot molten material (magma) rising from the Earth's mantle into the crust that pushes overlying sedimentary rock layers upward to form a “dome” shape
15. two or more of Earth's tectonic plates are pushed together

1. a group of mountains that form a chain or cluster
3. the visible features of an area of land, its landforms, and how they integrate with natural or man-made features
6. a narrow valley, usually with a stream or river running through it
8. when wind or water sweeps away rock or soil from one place on the Earth's surface to another
10. a slab of land breaks off and is forced up as two of Earth's tectonic plates pull apart or push together
12. remnants of previously existing mountains that have been subjected to weathering and erosion for an extended period