Plates Quiz 2 Answers 19th Sept

 ANSWERS

			[4]
		Generally found along plate boundaries Greater concentration around the Pacific ocean, forming the Pacific ring of fire Western coast of North and South America ·       Along eastern Asia passing through Japan Hotspot volcanoes can also be found in the middle of the Pacific ocean - Atlantic Ocean : stretches from north to south
		Fig. 2 On Fig. 2, label the following : ·       the vent (Change pipe to vent) ·       the crater ·       the secondary cone	[3]
	(c)	Explain how earthquakes are formed.	[4]
		When plates converge, diverge or slide past each other, the movement is not smooth. The rocks are under enormous stress and large amount of stored energy is built up, forcing the rocks to bend. The stress in the rocks becomes so tremendous that it finally causes the rocks to jerk free into new positions along the fault line. This results in the release of the stored energy in the form of seismic waves which make the ground vibrate, forming earthquake.
		Sea   Fig. 3 On Fig. 3, label the following : ·       the denser oceanic plate ·       the subduction zone ·       the oceanic trench ·       Melted magma	[4]