31
Lesson 31 of 84 · U.S. Regions
Comparing Regions Then and Now
Borders can be natural (rivers, mountains) or political (drawn by treaty). Some are disputed, leading to conflicts that affect the people who live near them.
Key Facts
1
Earth has seven continents.
2
There are five major oceans.
3
Climate differs from weather.
Check Your Understanding
Question 1
1 of 2How many continents are there?