1. Changes to Land
Grades 3-5

2. Landforms
Features on the surface of the earth such as mountains, hills, dunes, oceans and rivers

3. Features
Features on the surface of Earth such as mountains, hills, dunes, oceans, and rivers

4. Delta
A triangle shaped landform at the mouth of a river as it empties into another body of water

5. Canyon
A deep gorge in the surface of Earth formed by the erosion of moving water and sand

6. Sand Dune
Hills formed by the wind blowing sand

7. Mountain
Very large rock formation with peak at top

8. Hill
A large land formation of rocks, dirt, and grass that has rounded at the top

9. Valley
The flat area between two mountains or hills

10. Glacier
Slowly moving river of ice

11. V-Shaped Valley
A valley formed by moving water

12. U-Shaped Valley
A valley formed by a slow moving glacier of ice

13. Plain
A large area of land that is flat with no mountains, hills, or valleys

14. Weathering
The breakdown of rock into smaller particles from the effects of wind, water, and ice

15. Erosion
The movement of weathered material on Earth’s surface by wind, water, or ice.

16. Deposition
The build up of land by depositing sediment and soil in a new location

17. Erupt
To break open suddenly

18. Volcano
A mixture of hot rocks, ash, and gases that blows through a crack in the Earth’s surface

19. Landslide
The rapid downward slide of rocks and mud

20. Earthquake
A sudden release of energy under the Earth's surface that makes the ground shake or crack

21. Sediment
Small pieces of rock