Mountains Compare types of mountains. Essential Questions: Compare types of mountains. Identify the forces that shape Earth’s mountains.

Mountains There are four main types of mountains: fault-block, folded, upwarped, and volcanic. Each type forms in a different way and can produce mountains that vary greatly in size.

Mountains The ruggedness of a mountain chain depends largely on whether or not it is still forming. Stopped forming Still forming

Mountains Infer what determines how rugged and high a mountain chain is. Whether or not it is still forming.

Mountains Define fault-block mountains. Sharp, jagged mountains made of huge, tilted blocks of rock that are separated from surrounding rock by faults and form because of pulling forces Define fault-block mountains. Sierra Nevada in California

Mountains Rock layers get pulled in opposite directions, large blocks slide downward, creating valleys and peaks. Describe how fault-block mountains form.

Mountains Define folded mountains. Mountains that form by the folding of rock layers caused by compressive forces Define folded mountains. Appalachian in Maryland

Mountains Compression: two plates are pushed together, this causes rock layers to buckle and fold Describe how folded mountains form.

Mountains Define upwarped mountains. Mountains that form when forces inside Earth push up on the crust Define upwarped mountains. Rocky Mountains in Colorado

Mountains Forces inside Earth push up the crust; with time sedimentary rock layers erode exposing igneous and metamorphic rock Describe how upwarped mountains form.

Mountains Define volcanic mountains. Mountains that form when magma is forced upward and flows onto Earth’s surface Define volcanic mountains. Mt St Helens in Washington

Mountains Magma from inside the Earth, called lava after it reaches Earth’s surface, cools. Over time, layer upon layer of lava piles up creating a cone shaped feature. Describe how volcanic mountains form.

Uplift If you were to place wooden blocks of various thickness in a container of water you would notice that different blocks of wood would float at different heights. The thicker wood would float higher in the water than the thinner blocks would.

Uplift With the blocks, the buoyant force of water is balancing the force of gravity. A similar process called ISOSTASY occurs in Earth. Principle stating that Earth’s lithosphere floats on a plasticlike upper part of the mantle called the asthenosphere Define isostasy

Uplift The principle of isostasy is why the crust under mountains is thicker than it is elsewhere. Isostasy also the floating of icebergs.

Mountains Pictures http://www.pitt.edu/~cejones/GeoImages/3IntrusiveBodies/1Plutonsz/1SierraNevada.html http://en.wikipedia.org/wiki/Mountain_formation http://www.city-data.com/forum/nature/912962-how-mountain-ranges-were-created-serious-44.html http://www.coolgeography.co.uk/GCSE/AQA/Restless%20Earth/Tectonics/Landforms_at_%20plate_%20boundaries.htm

Mountains Pictures http://livestockandenvironment.org/?attachment_id=443 http://www.oocities.org/williamswindow/landforms.html http://en.wikipedia.org/wiki/Mount_St._Helens http://www.slipperysnake.co.uk/educational-materials/geography/volcanoes/ http://volcano.oregonstate.edu/education/vwlessons/lessons/Earths_layers/Earths_layers5.html http://thedailyeater.com/?p=4824