74
Lesson 74 of 84 · U.S. Regions
Alaska and Hawaii
Tropical rainforests near the equator are the most biodiverse ecosystems. The Amazon alone contains about 10 percent of all species on the planet.
Key Facts
1
Geography affects how people live.
2
Earth has seven continents.
3
There are five major oceans.
Check Your Understanding
Question 1
1 of 2Which is the largest ocean?