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11.3 Summary: Mountain Building and Geologic Time (Pages 390-403)
1) Most mountains are large areas that have been uplifted due to the
_____________________________________________________________. Sedimentary
rocks that are placed under slow, gradual pressure can either ___________ (a bend in rock
layers) or _______________ (a break in rock layers).
2) ____________ mountains: When plates collide, rocks can fold if they are hot enough to act
like bendable plastic.
3) ______________________ mountains: Sometimes the rocks in Earth’s crust are too brittle to
fold, and they instead break, forming a fault. Fault blocks can tilt or slide down.
4) Mountains created by volcanic eruptions: Melted rock wells up under the edge of the
overriding plate, pushing up mountains.
5) _______________ are the remains of organisms that lived long ago.
6) The ______________________________________ divides the Earth’s history into smaller
units based on the appearances of different kinds of life forms in the fossil record.
7) The appearance of fossils in rock layers has provided important clues for scientists about
Earth’s _____________ and ____________________.