29
Lesson 29 of 84 · Geography
Land Shapes: Hills, Valleys, Plains
Volcanoes are mountains that can erupt with hot lava. Some volcanoes are active, and some have not erupted in a very long time.
Key Facts
1
Weather changes day to day; climate is long-term.
2
Earth has seven continents.
3
There are five oceans.
Check Your Understanding
Question 1
1 of 2What is a river?