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1. Primary waves ar body waves that argon considered the further-pull waves, as they driving force rocks in the solicitude which the wave is actually drop deadling. Secondary waves nuclear number 18 also body waves, they shake particles at right angles to the direction they travel. They argon used when determining the character of the layers because of the speed at which they travel. The differences between the density of layers determines how fast the P and S waves pass on travel. These waves can determine an epicentre of an earthquake by sexual congress how far the hasten between the deuce waves is, meaning the further the distance of travel by both waves, the farther the epicenter is from the current localization of seismogram (Tarbuck & Lutgens, 2009). 2. There are a hardly a(prenominal) different types of volcanoes and the shapes they become as well. Cinder cone volcanoes are built from lava fragments existence ejected, and then harden during their flight paths and wee on the sort of cinders. They are usually created from a temporary eruptive event. involved cones are volcanoes, considered the intimately dangerous type. commonly a large, trigonal shaped volcano composed of lava and pyroclastic deposits. Lava tends to stream from fissures on the trim flank of the cone itself, which is why it is considered the most dangerous.

Lastly, shield volcanoes, are potpourried by the growth from of late ocean floors which then it forms islands. The shape resembles a warriors shield, because of the accumulation of suave lavas, causing a slightly domed structur e. These three types are mostly named by t! he shape in which they take and how they are formed (Tarbuck & Lutgens, 2009). 3. divergent plate boundaries are usually put together on crests of the oceanic covers. Plates begin to locomote away from ridge axis, these fractures that form are filled with molten rock, magma then cools creating sensitive slivers at the bottom of ocean floor. Convergent boundaries are where two plates move towards one another rather than apart. The one acuity bends...If you loss to get a full essay, order it on our website: OrderCustomPaper.com

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