4A Vocab

2. ridges- under sea mountain range that forms where two parts of earth’s crust are pushing apart.
6. height above sea level.
7. maps- map that shows the shape and elevation of the land surface using contour lines, and shows other land features using symbols.
10. boundary- formed where two sections of earth’s crust are colliding.
11. the process in which one lithospheric plate slides under another; occurs at converging plate boundaries.
12. boundary- a boundary between two lithospheric plates are sliding past each other.
13. block mountains- mountains formed when rocks move along faults, leaving blocks of crust at different elevations.

1. crust- portion of earth’s crust that lies beneath the oceans; it is thinner than continental crust.
3. boundary- form where lithospheric plates are moving away from each other.
4. lines- on a map, a line that connects points of equal elevation above sea level.
5. outermost layer of earth’s surface, which is rocky and solid; includes the crust and the rigid part of the upper mantle.
8. crust- rocky material that makes up the continents; it is less dense and contains a greater amount of lighter colored minerals than oceanic crust.
9. mountains- mountains formed by the bending of rocks.