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Geography 8035 GCSE (AQA)
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Welcome!Today we'll explore tectonic hazards, a key topic in Geography 8035 GCSE (AQA). We'll learn what they are, why they happen, and how we can manage their impacts. Let's get started!
What are Tectonic Hazards?Tectonic hazards are natural events caused by movement in the Earth's crust, such as earthquakes and volcanic eruptions. These hazards can cause damage to buildings, infrastructure, and even loss of life. Understanding their causes and impacts helps us to prepare for and manage them effectively.
Plate Tectonics TheoryThe Earth's crust is divided into large pieces called tectonic plates. These plates float on the semi-molten mantle below. Their movement is caused by convection currents in the mantle, which are driven by heat from the Earth's core. The interaction of these plates creates different types of tectonic hazards.
Quick check: What causes tectonic plates to move?
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Types of Plate MarginsThere are three main types of plate margins where tectonic activity occurs:Constructive margins: Plates move apart, and magma rises to form new crust. Volcanoes and mid-ocean ridges are common here.Destructive margins: Plates move towards each other, and one plate is forced beneath the other (subduction). This can create earthquakes and volcanic eruptions.Conservative margins: Plates slide past each other, causing friction and pressure to build up. This often results in earthquakes but no volcanic activity.
At {{blank0}} margins, plates move apart, while at {{blank1}} margins, plates slide past each other.
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Effects of Tectonic HazardsTectonic hazards have primary effects (immediate impacts like buildings collapsing) and secondary effects (long-term impacts like homelessness or economic loss). The severity of these effects depends on factors such as the wealth of the affected country and the level of preparedness.
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Managing Tectonic RisksWe can reduce risks from tectonic hazards using strategies such as monitoring and prediction (e.g., tracking earthquakes and volcanic activity), protection (e.g., building earthquake-resistant structures), and planning (e.g., evacuation plans and hazard maps).
Which of the following is an example of protection against tectonic hazards?
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Review Time!Great work! You've learned about tectonic hazards, plate margins, their effects, and how to manage risks. Let's test your understanding now.
Which of these are types of plate margins? (Select all that apply)
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Match the items on the left with their correct pairs on the right
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The {{blank0}} margin is where plates move towards each other, while the {{blank1}} margin is where plates move apart.
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Match the items on the left with their correct pairs on the right
Start the lesson to answer this matching question
Well done!You've completed the lesson on tectonic hazards. Keep practising and exploring the topic to deepen your understanding. Great job today!
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