The Structure Of The Earth And Distribution Of Earthquakes And Volcanoes
Muhtasari
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.
Malengo
- 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.
Maelezo ya Somo
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Utakutana na mchanganyiko wa aina mbalimbali za maswali, ikiwemo maswali ya kuchagua jibu sahihi, maswali ya majibu mafupi, na maswali ya insha. Kila swali limebuniwa kwa umakini ili kupima vipengele tofauti vya maarifa yako na ujuzi wa kufikiri kwa makini.
Tumia sehemu hii ya tathmini kama fursa ya kuimarisha uelewa wako wa mada na kubaini maeneo yoyote ambapo unaweza kuhitaji kusoma zaidi. Usikatishwe tamaa na changamoto zozote utakazokutana nazo; badala yake, zitazame kama fursa za kukua na kuboresha.
- 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
Inapatikana kwenye programu ya Green Bridge
Pakua programu ya Green Bridge CBT kwenye simu yako au kompyuta yako ili kupata maelezo kamili ya masomo, maswali ya mazoezi, na mengi zaidi.
Inapatikana kwenye programu ya Green Bridge
Pakua programu ya Green Bridge CBT kwenye simu yako au kompyuta yako ili kupata maelezo kamili ya masomo, maswali ya mazoezi, na mengi zaidi.
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