Our facts
- A earthquake is a shaking of the ground.
- Volcanos grow old and die.
- Erosion happens when worn down rocks are carried away.
- Earths crust is made up of pieces called plates.
- A glacier is a huge mass of moving ice.
- When water ice or air rubs against rock it wears away at the rock.
- Erosion may happen so slowly that you can not see it.
- Sometimes the edges of two plates move or rub against each other that can cause a earthquake.
- A tornado is a small powerful wind storm over land.
- Some volcanoes may stay quiet for hundreds of years.