The Structure Of The Earth And Distribution Of Earthquakes And Volcanoes
Gbogbo ọrọ náà
The ground beneath your feet feels solid and still, yet it is riding slowly across a planet whose interior is hot enough to melt rock. The Earth is built in layers, and its rigid outer shell is broken into giant slabs called tectonic plates that drift a few centimetres a year, about the speed your fingernails grow. Where these plates meet, the planet shudders, splits and erupts.
In this lesson you will travel from the inner core to the crust, name and place the world's main plates, and learn why earthquakes and volcanoes are not scattered at random but line up neatly along plate boundaries. By the end you will be able to read a world hazard map and explain exactly what is happening at each kind of boundary.
Ebumnobi
- The characteristics of the layers of the Earth: inner core, outer core, mantle, crust, lithosphere.
- The names and location of the main tectonic plates and how tectonic plates move.
- Types of plate boundary: divergent/constructive, convergent/destructive, convergent/collision, conservative/transform and the location of earthquakes and volcanoes.
Nkuzi Olu
Gee ntị na nkuzi a na ngwa
Maapụ uche
E seela isiokwu a ka ị hụ otu echiche si ejikọta.
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Kaadị ncheta
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Mee omume kaadị ndị a na ngwa
Akwụkwọ Ọmụmụ
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Ekele diri gi maka imecha ihe karịrị na The Structure Of The Earth And Distribution Of Earthquakes And Volcanoes. Ugbu a na ị na-enyochakwa isi echiche na echiche ndị dị mkpa, ọ bụ oge iji nwalee ihe ị ma. Ngwa a na-enye ụdị ajụjụ ọmụmụ dị iche iche emebere iji kwado nghọta gị wee nyere gị aka ịmata otú ị ghọtara ihe ndị a kụziri.
Ị ga-ahụ ngwakọta nke ụdị ajụjụ dị iche iche, gụnyere ajụjụ chọrọ ịhọrọ otu n’ime ọtụtụ azịza, ajụjụ chọrọ mkpirisi azịza, na ajụjụ ede ede. A na-arụpụta ajụjụ ọ bụla nke ọma iji nwalee akụkụ dị iche iche nke ihe ọmụma gị na nkà nke ịtụgharị uche.
Jiri akụkụ a nke nyocha ka ohere iji kụziere ihe ị matara banyere isiokwu ahụ ma chọpụta ebe ọ bụla ị nwere ike ịchọ ọmụmụ ihe ọzọ. Ekwela ka nsogbu ọ bụla ị na-eche ihu mee ka ị daa mba; kama, lee ha anya dị ka ohere maka ịzụlite onwe gị na imeziwanye.
- Which layer of the Earth is a solid ball of iron and nickel at the centre? A. crust B. mantle C. outer core D. inner core Answer: D
- At which type of plate boundary is new oceanic crust formed? A. conservative/transform B. convergent/collision C. divergent/constructive D. convergent/destructive Answer: C
- Oceanic crust sinks beneath continental crust at a destructive boundary because the oceanic crust is: A. thicker B. denser C. older D. cooler Answer: B
- The main force that moves tectonic plates is: A. tides in the oceans B. the Earth's rotation C. convection currents in the mantle D. gravity from the Moon Answer: C
- The Himalayas were formed at a boundary where: A. two oceanic plates move apart B. two continental plates collide C. plates slide past each other D. oceanic crust subducts under continental crust Answer: B
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