How do glaciers carve rocks and valleys? Objective Students will be able to: • Form glacial features in a sand box model river valley. • Identify glacial features on the landscape - terminal and lateral moraines, the headwall, cirques, tributary glaciers, and hanging valleys. Background Using river trough from The Work of Water lesson plan, students place/move frozen ice blocks with gravel/rocks in them through the sand to form glacially carved valleys, cirques, tarn lakes, etc. Freeze gravel and small rocks into ice blocks so they will have a rough base when they start to melt. Then thaw them Duration: 60 Minutes Essential Question How do glaciers carve rocks and valleys? Objective Students will be able to: • Form glacial features in a sand box model river valley. • Identify glacial features on the landscape - terminal and lateral moraines, the headwall, cirques, tributary glaciers, and hanging va.