The Structure Of The Earth And Distribution Of Earthquakes And Volcanoes
Overview
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.
Objectives
- 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.
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Lesson Note
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Lesson Evaluation
Congratulations on completing the lesson on The Structure Of The Earth And Distribution Of Earthquakes And Volcanoes. Now that youve explored the key concepts and ideas, its time to put your knowledge to the test. This section offers a variety of practice questions designed to reinforce your understanding and help you gauge your grasp of the material.
You will encounter a mix of question types, including multiple-choice questions, short answer questions, and essay questions. Each question is thoughtfully crafted to assess different aspects of your knowledge and critical thinking skills.
Use this evaluation section as an opportunity to reinforce your understanding of the topic and to identify any areas where you may need additional study. Don't be discouraged by any challenges you encounter; instead, view them as opportunities for growth and improvement.
- 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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