PLATE TECTONICS!!! by JULIE HOGWARDS https://padlet.com/lubaina_aman786/ipu7bwqgaim3 Made with love en-us 2017-09-07 15:19:06 UTC 2026-01-06 06:16:29 UTC hello@padlet.com Transform Boundries lubaina_aman786 https://padlet.com/lubaina_aman786/ipu7bwqgaim3/wish/185556311  Three types of plate boundaries exist  The different types of plate boundaries are:
Transform boundaries occur where two lithospheric plates slide, or perhaps more accurately, grind past each other along transform faults, where plates are neither created nor destroyed. The relative motion of the two plates is either sinistral (left side toward the observer) or dextral(right side toward the observer). Transform faults occur across a spreading center. Strong earthquakes can occur along a fault. The San Andreas Fault in California is an example of a transform boundary exhibiting dextral motion.
Transform Boundary]]> 2017-09-07 15:21:38 UTC https://padlet.com/lubaina_aman786/ipu7bwqgaim3/wish/185556311 Divergent Boundaries lubaina_aman786 https://padlet.com/lubaina_aman786/ipu7bwqgaim3/wish/185562056  Divergent Boundaries occur where two plates slide apart from each other. At zones of ocean-to-ocean rifting, divergent boundaries form by seafloor spreading, allowing for the formation of new ocean basin. As the ocean plate splits, the ridge forms at the spreading center, the ocean basin expands, and finally, the plate area increases causing many small volcanoes and/or shallow earthquakes. At zones of continent-to-continent rifting, divergent boundaries may cause new ocean basin to form as the continent splits, spreads, the central rift collapses, and ocean fills the basin. Active zones of Mid-ocean ridges (e.g., Mid-Atlantic Ridge and East Pacific Rise), and continent-to-continent rifting (such as Africa's East African Rift and Valley, Red Sea) are examples of divergent boundaries.
Divergent Boundary]]> 2017-09-07 15:32:13 UTC https://padlet.com/lubaina_aman786/ipu7bwqgaim3/wish/185562056 Convergent Boundaries lubaina_aman786 https://padlet.com/lubaina_aman786/ipu7bwqgaim3/wish/185564991 Convergent boundaries occur where two plates slide toward each other to form either a subduction  zone (one plate moving underneath the other) or a continental collision. At zones of ocean-to-continent subduction (e.g. the Andes mountain range in South America, and the Cascade Mountains in Western United States), the dense oceanic lithosphere plunges beneath the less dense continent. Earthquakes trace the path of the downward-moving plate as it descends into asthenosphere, a trench forms, and as the subducted plate is heated it releases volatiles, mostly water from hydrous minirals, into the surrounding mantle.
Convergent Boundary

]]> 2017-09-07 15:37:50 UTC https://padlet.com/lubaina_aman786/ipu7bwqgaim3/wish/185564991 Lithosphere lubaina_aman786 https://padlet.com/lubaina_aman786/ipu7bwqgaim3/wish/185573432 The lithosphere, which is the rigid outermost shell of a planet (the crust and upper mantle), is broken into tectonic plates. The Earth's lithosphere is composed of seven or eight major plates (depending on how they are defined) and many minor plates. Where the plates meet, their relative motion determines the type of boundary: convergent, divergent, or transform. Earthquakes, volcanic activity, mountain-building, and oceanic trench formation occur along these plate boundaries (or faults). The relative movement of the plates typically ranges from zero to 100 mm annually.
Tectonic plates are composed of oceanic lithosphere and thicker continental lithosphere, each topped by its own kind of crust. Along convergent boundaries, subduction, or one plate moving under another, carries the lower one down into the mantle; the material lost is roughly balanced by the formation of new (oceanic) crust along divergent margins by seafloor spreading. In this way, the total surface of the lithosphere remains the same. This prediction of plate tectonics is also referred to as the conveyor belt principle. Earlier theories, since disproved, proposed gradual shrinking (contraction) or gradual expansion of the globe.
]]> 2017-09-07 15:53:27 UTC https://padlet.com/lubaina_aman786/ipu7bwqgaim3/wish/185573432 Plate Tectonics lubaina_aman786 https://padlet.com/lubaina_aman786/ipu7bwqgaim3/wish/185575308 Plate tectonics is a scientific theory describing the large-scale motion of seven large plates and the movements of a larger number of smaller plates of the Earth's lithosphere, over the last hundreds of millions of years. The model builds on the concept of continental drift, an idea developed during the first decades of the 20th century. The geoscientific community accepted plate-tectonic theory after seafloor spreading  was validated in the late 1950s and early 1960s
]]> 2017-09-07 15:56:34 UTC https://padlet.com/lubaina_aman786/ipu7bwqgaim3/wish/185575308 markus murray https://padlet.com/lubaina_aman786/ipu7bwqgaim3/wish/228778535 2018-02-06 18:34:48 UTC https://padlet.com/lubaina_aman786/ipu7bwqgaim3/wish/228778535