Good Learning Co.
SavannahYear 8
← Geography
GeographyRestless Earth: plates, earthquakes and volcanoes25 min★★★ difficulty

Living with tectonic hazards: prediction, protection and planning

Around a tenth of the world's population lives within reach of an active volcano. That is not carelessness. It is a trade-off, and the job of a geographer is to weigh both sides.

Part of your national curriculum
  • Human and physical geography: Understand tectonic processes and hazards, including earthquakes and volcanic activity
  • Place knowledge: Understand the physical and human characteristics of an area of the UK and a wider region of the world beyond Europe

Lesson overview

What you'll learn in this lesson

Evaluate why people live in hazardous places and how risk is reduced.

Key learning points

  • • Why people stay
  • • Prediction
  • • Protection
  • • Planning and preparedness

This lesson at a glance

  • 25 minutes
  • 21 parts to scroll through
  • 4 quick checks
  • Marked quiz at the end
  • Gentle pace: short sittings with pauses

Words to know

peoplehazardousplacesreducedprediction

Scroll down — the lesson carries on below

Part 1 of 21 · Discover5%
1

Watch & discover

Part 1 of 21

Living with tectonic hazards: prediction, protection and planning illustrationVisual introduction

Picture this

Living with tectonic hazards: prediction, protection and planning

Around a tenth of the world's population lives within reach of an active volcano. That is not carelessness. It is a trade-off, and the job of a geographer is to weigh both sides.

In a nutshell

Evaluate why people live in hazardous places and how risk is reduced.

2

Learning cycle

Part 2 of 21

Learning cycle 1 of 2

Part 1 · Why people stay

A short piece of teaching, then a check to make sure it has landed.

3

Explore the idea

Part 3 of 21

Learn

Why people stay

Volcanic soils are extremely fertile, which supports dense farming on the slopes of Etna or in Java. Geothermal energy heats and powers most of Reykjavik. Tourism brings jobs and money. Minerals such as sulphur, copper and diamonds are mined in tectonic zones. Beyond the benefits, many people simply cannot afford to move, have family and work there, or believe an event is unlikely in their lifetime.

4

Reset break

Part 4 of 21

Pause

That's sitting 1 of 5 done

Stretch, get a drink, look out of the window. There is no timer and nothing is counting down — your place is saved, so you can come back in five minutes or tomorrow.

Stop here for now
5

Explore the idea

Part 5 of 21

Learn

Prediction

Volcanoes can be monitored and often predicted: seismometers detect rising magma, tiltmeters and satellites measure the bulge of the volcano's flank, and gas sensors pick up increasing sulphur dioxide. That warning allows evacuation. Earthquakes cannot be predicted with useful precision. The best available is a probability forecast for a region over decades, plus seconds-long automated warnings that stop trains and shut off gas once shaking begins.

6

Quick check

Part 6 of 21

Quick check

Which hazard can be predicted reliably enough to evacuate?

Give me a hint
7

Quick check

Part 7 of 21

Quick check

What does a base isolator do?

Give me a hint
8

Reset break

Part 8 of 21

Pause

That's sitting 2 of 5 done

Stretch, get a drink, look out of the window. There is no timer and nothing is counting down — your place is saved, so you can come back in five minutes or tomorrow.

Stop here for now
9

Learning cycle

Part 9 of 21

Learning cycle 2 of 2

Part 2 · Protection

A short piece of teaching, then a check to make sure it has landed.

10

Explore the idea

Part 10 of 21

Learn

Protection

Aseismic design uses cross-bracing, deep foundations anchored into bedrock, counterweights or base isolators that let the building move independently of the ground, and automatic shut-off valves. Retrofitting older buildings is expensive but saves the most lives. Against lava and lahars, engineers use diversion channels, barriers and, for smaller flows, water cooling.

11

Explore the idea

Part 11 of 21

Learn

Planning and preparedness

Hazard maps keep hospitals, schools and fuel depots off the highest risk ground. Drills, such as Japan's annual national exercise, mean people act automatically. Emergency supplies, insurance, evacuation routes and clear public information turn a disaster into a manageable emergency. Planning is usually the cheapest of the three and gives the best value per pound spent, which is a strong evaluation point.

12

Reset break

Part 12 of 21

Pause

That's sitting 3 of 5 done

Stretch, get a drink, look out of the window. There is no timer and nothing is counting down — your place is saved, so you can come back in five minutes or tomorrow.

Stop here for now
13

Quick check

Part 13 of 21

Quick check

Why do people farm the slopes of active volcanoes?

Give me a hint
14

Quick check

Part 14 of 21

Quick check

Which measure gives the best protection per pound in a lower income country?

Give me a hint
15

Explore the idea

Part 15 of 21

Worked example

Worked answer: 'Prediction is the most effective way to reduce the effects of tectonic hazards.' Evaluate (9 marks)

Argue for: volcanic prediction genuinely works, and monitoring plus timely evacuation has saved thousands of lives, so where the hazard is a volcano prediction is powerful. Argue against: earthquakes cannot be predicted, so in the world's most densely populated seismic cities prediction offers almost nothing, and warning is only useful if people have somewhere to go. Compare: protection through aseismic building saves lives in every earthquake without any warning, and planning through drills and hazard maps is cheap enough for lower income countries to afford. Conclude with a judgement that is conditional: prediction is most effective for volcanoes, but for earthquakes a combination of building design and preparedness saves far more lives, so the statement is only partly true.

16

Reset break

Part 16 of 21

Pause

That's sitting 4 of 5 done

Stretch, get a drink, look out of the window. There is no timer and nothing is counting down — your place is saved, so you can come back in five minutes or tomorrow.

Stop here for now
17

Challenge round

Part 17 of 21

Game · Sort it

Which of these are true?

Drag each card into the right column. Tap a card first if dragging is fiddly.

True

Not true

18

Challenge round

Part 18 of 21

Game · Fill the gaps

Finish the sentences

Choose the word that belongs in each gap.

Beyond the benefits, many ____ simply cannot afford to move, have family and work there, or believe an event is unlikely in their lifetime.

19

Challenge round

Part 19 of 21

Game · Recall cards

Why can oceanic crust sink beneath continental crust?

Card 1 of 4

20

Mastery quiz

Part 20 of 21

Marked quiz

End of lesson quiz: Living with tectonic hazards: prediction, protection and planning

4 questions, marked with the reasoning shown. No timer.

  1. 1. Why can oceanic crust sink beneath continental crust?

  2. 2. Which is the strongest single piece of evidence for sea-floor spreading?

  3. 3. What does slab pull describe?

  4. 4. Why is Hawaii volcanic despite sitting far from a plate margin?

21

Lesson round-up

Part 21 of 21

Lesson round-up

Ready when you are

Quiz score

Not sat

Games

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Points this lesson

0

Best run

0 in a row

Luna: 0 out of 4 on the practice checks. Only if you feel up to it — one more?

Ask Luna

Part 1 of 21 · Watch & discover

How this is going

  • Not looked at yet

    Understand tectonic processes and hazards, including earthquakes and volcanic activity

  • Not looked at yet

    Understand the physical and human characteristics of an area of the UK and a wider region of the world beyond Europe

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