Chapter
9 The Earth Changing Surface
Section 1 Weathering
Physical weathering 425
Chemical weathering 426
Mixed weathering 428
Rates of weathering 429
From rock to soil 431
Section 2 Erosion
Erosion by running water 438
The formation of a river valley 441
Erosion by glaciers 443
Erosion by more than one agent 445
Controlling erosion 447
Section 3 Deposition
Deposition by running water 454
Stream erosion and deposition 457
Deposition by wind 459
Deposition by glaciers 461
Chapter 10 The
Restless Crust
Section 1 Volcanoes
The power of a major volcanic eruption 471
Why some eruptions are so violent 475
Volcanic landforms 477
Where volcanoes occur 480
Section 2 Stress,
Structure and Earthquakes
Rocks under stress 485
Movement along a fault 489
What is an earthquake? 494
Earthquake damage 497
Section 3 Plate
tectonics
The interior of the earth 502
The theory of continental drift 504
The theory of plate tectonics 508
Pangaea 511