| A | B |
|---|
| Main Idea | Weathering and erosion usually cause slow changes to Earth's surface |
| weathering | the breaking down of rocks into smaller pieces |
| erosion | the movement of weathered rock |
| glacier | a large sheet of ice that moves slowly over land |
| deposition | the dropping off of weathered rock |
| ventifact | rock that has been weathered by wind |
| hoodoos | rock that has been worn mostly by water that freezes and then thaws inside cracks in the rock |
| gravity | pulls down rocks |
| moving water | carries water down stream |
| Culebra Mountains, Panama | carved out to build the Panama Canal in 1913 |
