Q2: 1. Is all rock the same age? Explain.

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Q2: 1. Is all rock the same age? Explain. 2. Explain how new rock is created. Explain how old rock is destroyed. Describe the rock cycle and how one type of rock becomes another type of rock.

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I understand the effects of plate boundary movements. Today’s objective I understand the effects of plate boundary movements.

Ring of Fire: Horseshoe shaped area where 75% of Earth’s volcanoes are…and many earthquakes occur due to plate boundary movements. area in the Pacific Ocean where a large number of earthquakes and volcanic eruptions occur

sea floor spreading occur? Divergent Oceanic Plates Where does sea floor spreading occur? Divergent Oceanic Plates

place in the ocean where at divergent plate boundaries Mid-ocean trench: place in the ocean where new rock is created; at divergent plate boundaries

Mid-Ocean Ridge: The pile of mountain created when new rock is made

So…if we are continually making new rock at the mid-ocean trench, is the Earth getting larger?

Subduction Zone: oceanic crust slides under a continental crust; rock sinks and becomes magma again

Sea-Floor Spreading New Rock is Formed

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What happens to the crust at convergent oceanic plates? Volcanic islands…like Hawaii, Indonesia, Japan, Alaska

Arc Island: Type of island, usually found in chains or groups, caused by convergent oceanic-oceanic plates