[Lesson 7.]
1. Write out and learn: A long deep ditch filled with water is called a canal. Model a canal in clay or plasticine. What is the difference between a canal and a strait?
2. Copy this little drawing of a lighthouse. Write out and learn: A lighthouse is a tower near the sea. It shows a bright light at night to warn sailors of rocks or shallow places.
3. Why does a big ship "go slow" through the Suez Canal?
[Lesson 8.]
1. Write out and learn: A desert is a rainless tract of country on which little or nothing will grow. How can a desert be turned into a garden?