https://padlet.com/angus_sham/herzujn2dmya Snap a picture of your plate movement and label your picture en-us 2017-02-20 02:22:15 UTC 2023-07-10 01:26:03 UTC hello@padlet.com https://padlet.com/angus_sham/herzujn2dmya/wish/2641303162 title: oceanic oceanic convergence (imagine the whole plate is underwater) When two oceanic plates converge, the denser plate will subduct under the less dense plate. At the subduction zone, an oceanic trench is created. Slab pull force further pulls subducted plate into the mantle and it melts. Magma rises above the crust and forms new land / volcanos. ]]> 2023-07-10 00:58:19 UTC https://padlet.com/angus_sham/herzujn2dmya/wish/2641303162 https://padlet.com/angus_sham/herzujn2dmya/wish/2641303969 We couldn't fit this in:
Newly formed rocks are closest to the middle of the ridge boundary, rocks from the symmetrical side of the ridge have the same magnetic characteristics and age
Due to uneven cooling and solidifying，chain of mountains are formed at the plate boundaries]]> 2023-07-10 00:59:06 UTC https://padlet.com/angus_sham/herzujn2dmya/wish/2641303969 2021_natalie_low_jia_en1_11 https://padlet.com/angus_sham/herzujn2dmya/wish/2641304931

magma rises from the mantle to fill the gap between the plates as they diverge

the magma cools and solidifies when in contact with water

new sea floor is formed → this process is called sea-floor spreading

magma rises at the zone of divergence/spreading zone to form a ridge of new ocean floor called mid-oceanic ridge

the newly formed (youngest) rocks are closest to the middle of the ridge/plate boundaries

rocks from symmetrical side of the ridge have the same magnetic characteristics and age (same properties)

eventually, uneven cooling and solidifying occurs and a chain of mountains are found at the plate boundaries

magma that builds up above the ocean form volcanic islands

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the denser plate subducts under the less dense plate

the area where the two plates collide is known as the subduction zone

at the subduction zone, a depression in the sea floor called an oceanic trench is created

slab pull force further pulls the subducted plate into the mantle

the sinking crust of the denser plate melts, forming magma

the magma rises through the crust to form volcanoes

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when plates pull apart,faults are formed

a fault is a fracture in the rocks along which the rocks are displaced

this tensional force that cause the cracks is called faulting

tensional forces causes the center block of the land to subside between the two faults

the central portion that sinks forms a rift valley

a rift valley is a valley with steep sides that is formed when sections of crust extend along faultlines

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