13
Lesson 13 of 84 · U.S. Regions
Regional Economies
The Arctic is mostly frozen ocean; Antarctica is a continent covered by ice up to three miles thick. Both polar regions are affected by climate change.
Key Facts
1
There are five major oceans.
2
Climate differs from weather.
3
Natural resources are limited.
Check Your Understanding
Question 1
1 of 2What are natural resources?