| Term | Definition |
|---|
| What are glaciers and how do they form? | A thick mass of ice that forms over land; Formed by the compaction and recrystallization of snow |
| What are the driving forces of glaciers? | Gravity; then momentum once it gets moving. |
| What are the main types of glaciers? | Cirque, Alpine, Piedmont, Ice Sheets. |
| Cirque | Small, round perched bodies of ice on a mountain side |
| Alpine | Form in mountainous areas |
| Piedmont | coalescence of two or more Alpine glaciers; usually occupying lowlands |
| Ice Sheets | continental glaciers; large scale |
| Explain the factors that determine "behavior" (advance & Retreat) of glaciers: snowline | line above which there is permanent snow |
| Explain the factors that determine "behavior" (advance & Retreat) of glaciers: accumulation | area of ice addition; gain > loss |
| Explain the factors that determine "behavior" (advance & Retreat) of glaciers: ablation | wastage: are where there is a net loss; loss> gain |
| Explain the factors that determine "behavior" (advance & Retreat) of glaciers: Equilibrium | Snow gain = snow loss |
| Explain the factors that determine "behavior" (advance & Retreat) of glaciers: cravasses | fractures in body of ice; indicate velocity change |
| Explain how glaciers move, and what happens to them as they do. | Erosion; Plastic Flow (creeping movement), Slipping (sliding occurs along contacts mostly bottom), Facture (brittle failure, creating factured zones) |
| Glacial erosion: explain proccesses and describe resulting landforms; plucking | Plucking- fracturing and lifting up rock blocks |
| Glacial erosion: explain proccesses and describe resulting landforms; Abrasion | Abrasion- scraping and grinding (rock flower and striations) |
| Explain erosion, transport, and resulting landforms in glaciated regions; U-shaped valley | Glacial trough |
| Explain erosion, transport, and resulting landforms in glaciated regions; hanging valley | raised glacial valley that intersects the main glacial valley |
| Explain erosion, transport, and resulting landforms in glaciated regions; Fjord | narrow inlet caused by glaciers |
| Explain erosion, transport, and resulting landforms in glaciated regions; Arete | separates glacial valleys |
| Explain erosion, transport, and resulting landforms in glaciated regions; Horn | arete caused by glaciers |
| Explain erosion, transport, and resulting landforms in glaciated regions; Tarn | Mountain lake |
| Explain erosion, transport, and resulting landforms in glaciated regions; Roche Mountonee | rock mountain; ruminant of glacial movement |
| What is a loess, why do we have so much loess in Alaska? | Loess is glacial silt. There are/were so many glaciers here |
| What is permafrost, and where is it found on Earth? | Permantently frozen ground ; northern regions close to the northern polar region |
| Lenses | massive- big chunks of ice above ground |
| wedging | ice getting into the ground and creating cracks |
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