3rd Grade
1.) landform - shapes the make up the surface of the Earth
2.) border - a line that people agree on that divides one place from another
3.) glacier - thick sheet of ice
4.) elevation - the height of the land above the level of the sea; elevation at sea level is 0 feet
4th Grade
1.) geography - study of Earth and the ways people, plants, and animals use it
2.) landforms - a natural feature on Earth's surface
3.) valley - the low land between hills or mountains
4.) plateau - a large area that rises steeply above the surrounding land
5.) glacier - a giant sheet of ice