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Questions and Answers
Hvert er snælínuhæðin á Íslandi á Hornströndum?
Hvert er snælínuhæðin á Íslandi á Hornströndum?
Allir jöklar á Íslandi eru gaddjöklar.
Allir jöklar á Íslandi eru gaddjöklar.
False
Hvað gerist við jökla þegar loftslagsbreytingar verða?
Hvað gerist við jökla þegar loftslagsbreytingar verða?
Jöklar bráðna
Jöklar sverfa og móta landið með _________.
Jöklar sverfa og móta landið með _________.
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Hvað eru eftirfarandi myndanir jökulrofs kallaðar?
Hvað eru eftirfarandi myndanir jökulrofs kallaðar?
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Hver af eftirfarandi lýsingum passar best við hveljökla?
Hver af eftirfarandi lýsingum passar best við hveljökla?
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U-laga dalir eru myndaðir af jökli.
U-laga dalir eru myndaðir af jökli.
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Nefndu eitt dæmi um jökulhettur.
Nefndu eitt dæmi um jökulhettur.
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Hver af eftirfarandi lýsingum á jökulruðningi er rétt?
Hver af eftirfarandi lýsingum á jökulruðningi er rétt?
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Rofmörk jökla miðast við sjávarmál eins og hjá vatnsföllum.
Rofmörk jökla miðast við sjávarmál eins og hjá vatnsföllum.
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Hvert er orð yfir fjöll eða fjallstoppa sem eru umkringd af jökli?
Hvert er orð yfir fjöll eða fjallstoppa sem eru umkringd af jökli?
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Jökulgarður myndast þegar ________ hrynur af jökulsporðinum.
Jökulgarður myndast þegar ________ hrynur af jökulsporðinum.
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Sammaðu eftirfarandi fjórar jökulmyndanir við þeirra líklega eiginleika:
Sammaðu eftirfarandi fjórar jökulmyndanir við þeirra líklega eiginleika:
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Study Notes
Glaciers - Chapter 10
- Glaciers form when more snow accumulates annually than melts.
- Accumulation Zone: Area where snow doesn't melt throughout the year, above the snowline.
- Ablation Zone: Area where snow melts annually, below the snowline.
- Snowline: Boundary between the accumulation and ablation zones.
- Snowline Altitude: Varies based on weather conditions (temperature and precipitation). Lowest at the poles and highest near the equator (e.g., 5500 meters in Kilimanjaro). In Iceland, the snowline is lowest at 600 meters on the Hornstrandir peninsula.
Glacier Types (Icelandic Classification)
- Ice Caps: Large, dome-shaped glaciers covering extensive highland areas. Example: Vatnajökull.
- Ice Fields: Cover individual mountains. Examples: Þórisjökull and Öræfajökull.
- Valley Glaciers: Located in mountain valleys and in depressions between peaks. Example: Kerlingarfjöll.
- Piedmont Glaciers: Form at the foot of mountains and expand into valleys. Example: glaciers in the Tröllaskagi region.
International Glacier Classification (Based on Temperature)
- Polar Glaciers: At or below freezing temperature (0°C). Include all Icelandic glaciers.
- Alpine Glaciers: Below freezing temperature (<0°C). Found in high-latitude regions.
Glacier Erosion (Glacial Processes)
- Glacial Abrasion (Erosion by Rock): Glaciers carve into landscapes.
- Glacial Plucking: Ice breaks off rock and carries it away.
- U-Shaped Valleys: Glaciers carve out valleys with U-shaped cross-sections.
- Fjords: Glacially carved valleys that extend below sea level.
- Rock Striations: Scratches on rocks left by glacial abrasion, show direction of ice movement.
- Rock Basins (Cirques): Bowl-shaped depressions formed by glacial erosion.
- Hanging Valleys: Smaller valleys that join a larger valley at a higher elevation.
- Roches Moutonnées: Oval-shaped rock formations sculpted by glacial movement.
Glacier Deposits (Glacial Features)
- Glacial Till: Unsorted sediment deposited by glaciers.
- Moraines: Accumulations of till, found at the edges, sides, and base of glaciers.
- Lateral Moraines: Side ridges of till on a glacier's side.
- Medial Moraines: Till deposited in the middle of a glacier, formed by the merging of lateral moraines.
- Terminal Moraines: Ridges of till at the glacier's furthest advance.
- Erratics: Large boulders transported and deposited by glaciers.
- Eskers: Long ridges of sediment deposited by meltwater streams beneath glaciers.
- Glacial Outwash Plains: Flat areas of sediment deposited by meltwater streams.
- Kettle Lakes: Depressions filled with water, formed when blocks of ice melt within glacial deposits.
Other Glacial Features
- Glacial Horns: Sharp, pointed peaks formed by glacial erosion.
- Glacial Striations: Scratches on rocks left by glacial abrasion.
- Glacial Valleys: U-shaped valleys and fjords.
- Glacial Deposition: Material left behind by glaciers.
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Description
Í þessum kvizz ferðum við í kaflanum um jökla, þar sem við skoðum hvernig jöklar myndast og hvað gerir þá að slíku. Við ræðum um svæði eins og uppsöfnunarsvæðið og aflaganarsvæðið, auk mismunandi tegunda jökla. Kafa niður í áhugaverða eiginleika jökla í Íslandi og umhverfis þeim.
