GEOG 2051 - Namikas FINAL Exam Study Guide Questions And Answers Verified 100% Correct

GEOG 2051 - Namikas FINAL Exam Study Guide Questions And Answers Verified 100% Correct _____ are little grains of ice that get welded together to form solid mass of glacial ice - ANSWER -Firn What are the inputs/outputs of glaciers? - ANSWER -inputs: snow that falls on surface of glacier outputs: meltwater ____________ _______ is when temps are cold enough for some snow to persist on a year-round basis - ANSWER -Equilibrium line the _______ zone is the area above the firn line - ANSWER -Accumulation the accumulation zone has a ______ budget - ANSWER -positive the ________ zone is the area below the firn line due to melting - ANSWER Ablation the ablation zone has a _____ budget - ANSWER -negative in glaciers, the ____zone can crack very easily - ANSWER -Brittle Zone in glaciers, the ______ zone can bend and form, tends to stretch and bend downstream - ANSWER -Plastic Zone Internal deformation occurs when... - ANSWER -the weight of the ice causes the deformation of ice crystals meltwater lubricating the bottom of the glacier is called _____ ______. - ANSWER -basal slip _________ ______ is when meltwater freezes into underlying rock and then literally plucks it out of formation - ANSWER -glacial plucking _______ is when ice acts like a giant sheet of sandpaper as it carves grooves into underlying rock - ANSWER -Abrasion 3 kinds of alpine landforms: - ANSWER -1. Periglacial 2. Glacial 3. Postglacial which type of alpine landform results from seasonal thawing of permafrost where the runoff freezes in ice wedges - ANSWER -Periglacial which type of alpine landform has many glaciers running down the sides of mountains - ANSWER -glacial which type of alpine landform leaves behind a different landscape - ANSWER Postglacial bowl shaped impression found near mountain peak - the birthplace of alpine glaciers - ANSWER -Cirques a mountain lake or pool formed in a cirque excavated by a glacier - ANSWER tarns/paternoster lakes thin ridge of rock that is left separating the two valleys - ANSWER -Arêtes sharp jagged peaks on top of mountains - ANSWER -horns glacier has the ability to smooth out the sharp edges - ANSWER -U-shaped glacial trough a valley that is cut across by a deeper valley or a cliff - ANSWER -Hanging valley laid down by meltwater from glacier (larger materials) - ANSWER -stratified drift sediment that has been laid down where the glacial ice has melted, drops material in place - ANSWER -Till a plain formed of glacial sediments deposited by meltwater outwash at the terminus of a glacier - ANSWER -Outwash plain two types of moraines: - ANSWER -- terminal - recessional which type of moraine leaves small ridges as a glacier pauses during its retreat - ANSWER -Recessional which type of moraine is the furthest position the glacier reached? - ANSWER Terminal the ridge of gravelly and sandy drift, believed to have been formed by streams under or in glacial ice - ANSWER -Eskers irregularly shaped hills are called ____. - ANSWER -kames an inside-out feature that forms from a placeholder sitting there while sediment is deposited around it - ANSWER -kettle a low oval mound or small hill that consists of compacted boulder clay molded by past glacial action Created from sediment (till) that's laid down under base of glacier -- depositional - ANSWER -drumlin formed by the passing of a glacier, formed from bedrock (has erosional features) - ANSWER -Roche Moutonee