1. Vocabulary

2. peak The top of a mountain

3. canal a ditch dug across land that often connects two waterways

4. skyscraper a very tall building

5. Declaration of Independence document declaring the United States free from Great Britain

6. mill a factory in which people make products out of raw materials

7. American Revolution the war in which the American colonies won independence from Great Britain

8. lock a water elevator used to raise and lower boats

9. Mass production a way of making large quantities of products

10. United States Constitution the plan of government for the United States