What This Book Teaches Best
• Defines erosion as a slow, natural process that moves rocks and soil from one place to another.
• Compares different forces of erosion (water, ocean waves, rainfall/runoff, wind, ice/glaciers, gravity) using clear examples.
• Explains cause and effect in Earth changes, such as rivers cutting deep paths that form canyons and riverbanks over time.
• Shows that erosion can break down land in one place and build new land in another, including how a river can form a delta where it meets the ocean.
• Highlights ways nature can slow erosion, including how plant roots hold soil in place.

Learning Goals
• Students can define erosion using details from the text.
• Students can identify water as the most powerful cause of erosion described in the book.
• Students can explain how rivers, waves, and rainfall/runoff change land over time.
• Students can describe how wind, glaciers, and gravity move or reshape rock and soil.
• Students can explain how plants help prevent erosion from happening too quickly.
• Students can describe how a delta forms when a river drops sand and soil at the ocean.

Key Vocabulary From the Text
• erosion — moving rock and soil from one place to another.
• shoreline — where land meets the ocean.
• runoff — rainwater that flows downhill over the ground.
• glaciers — huge sheets of ice moving slowly across land.
• delta — land formed when a river drops sand and soil.

Discussion Prompts
• Pre-reading question: What are some ways land might change over a long time?
• Comprehension questions: How does the book describe erosion and what it moves?
• Comprehension questions: What does fast-moving river water do to the earth, according to the text?
• Comprehension questions: How do the roots of trees and grasses help stop erosion from happening too quickly?

Printing Tips

1. Best Printing Method (Recommended)
   “Booklet” Printing (Best if Available)
   If your printer or PDF viewer supports Booklet Printing, use this.
   Settings to use:
   • Print mode: Booklet
   • Paper size: Letter or A4 (either works)
   • Orientation: Landscape
   • Print on both sides: Yes
   • Flip on: Short edge
   • Scaling: Fit to printable area
   • Booklet subset:
   o First test: Front sides only
   o Then: Back sides only
   This will automatically:
   • Pair pages correctly
   • Put the cover on the outside
   • Align everything for folding
   After printing, fold in half and staple along the spine.

2. If “Booklet” Printing Is NOT Available
   You can still print this correctly with manual duplex printing.
   Step-by-step:

3. Open the PDF.

4. Choose Print.

5. Set:
   o Orientation: Landscape
   o Pages per sheet: 1
   o Print on both sides: Yes
   o Flip on: Short edge

6. Print all pages.
   Because each PDF page already contains two facing book pages, the result will still fold cleanly into a book.