This document defines different landforms including valleys, canyons, volcanoes, mountain ranges, and plains. Valleys are low lands between hills or mountains, canyons are deep valleys with high steep sides, volcanoes are openings where lava flows from the Earth's surface, mountain ranges are high rising land, and plains are wide flat areas.

1. Valley: Low land between hills or mountains

2. Canyon: Deep valley with high, steep sides

3. Volcano: An opening in Earth's surface from which lava flows

4. Mountain Range: Land which rises high above the ground

5. Plains: Wide, flat areas of land