Houghton Mifflin Social Studies
B. Rivers are always moving because they flow downhill.
C. Rivers flow into other rivers, lakes, or oceans, or they disappear underground.
II. Shaping the Land
B. Rivers may wander in loops, or change directions. This causes other changes in the land.
III. Flooding the Land
B. Most floods are harmful because they destroy homes and erode river banks.
C. Some floods are helpful because they bring new soil and build up the land.
Lesson at a Glance Outline
Chapter 1, Lesson 2: Running Rivers (pp. 18-23)
I. Constant Motion
A. Rivers begin in different ways, in lakes, from underground streams, and melting snow.
A. Rivers can shape the land into canyons and valleys by wearing away the soil and rock.
A. Floods are waters that overflow their banks and cover land that is usually dry.
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