Good Learning Co.
SavannahYear 8
← Geography
GeographyThe restless Earth30 min★★ difficulty

Volcanoes, and why people stay

Volcanoes build some of the most distinctive landscapes on Earth, and around 800 million people live close enough to one to be at risk. This lesson explains how eruptions shape the land and answers the question examiners love: why do people choose to live there?

Part of your national curriculum
  • Human and physical geography: Understand how geographical processes interact to create distinctive human and physical landscapes that change over time
  • Human and physical geography: Understand tectonic processes and hazards, including earthquakes and volcanic activity

Lesson overview

What you'll learn in this lesson

Understand how geographical processes interact to create distinctive human and physical landscapes that change over time

Key learning points

  • • Two very different shapes
  • • Landscapes that change fast, then slowly
  • • The reasons people stay
  • • Reducing the risk

This lesson at a glance

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

Words to know

geographicalprocessesinteractcreatedistinctive

Scroll down — the lesson carries on below

Part 1 of 19 · Discover5%
1

Watch & discover

Part 1 of 19

Watch first

Volcanoes, and why people stay

An English teaching video on this topic from iNewittAll. Watch it, then scroll down for the lesson.

In a nutshell

Understand how geographical processes interact to create distinctive human and physical landscapes that change over time

2

What you already know

Part 2 of 19

Before we start

What you already know

You should be able to name the three plate boundary types and explain subduction.

Recap: Plates, boundaries and earthquakes
3

Key words

Part 3 of 19

Key words

Words you'll need today

Magma
Molten rock below the surface; it is called lava once it erupts.
Composite volcano
A steep-sided cone of ash and sticky lava, typical of destructive boundaries.
Shield volcano
A wide, gently sloping volcano built by runny lava, typical of hotspots and rifts.
Geothermal energy
Electricity or heat generated using hot rocks underground.
Monitoring
Measuring gases, tremors and bulging ground to forecast an eruption.
4

Learning cycle

Part 4 of 19

Learning cycle 1 of 2

How volcanoes build landscapes

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

5

Explore the idea

Part 5 of 19

Learn

Two very different shapes

Where an oceanic plate subducts, water and melted crust make sticky, gas-rich magma. It cannot escape easily, so pressure builds and the eruption is explosive, throwing out ash and building a steep composite cone in layers. Where the mantle rises directly, as at a rift or a hotspot, the lava is runny and flows a long way before cooling, building a broad shield volcano. Shape tells you about the magma, and the magma tells you about the boundary.

6

Explore the idea

Part 6 of 19

Learn

Landscapes that change fast, then slowly

An eruption can rebuild a landscape in days: lava flows fill valleys, ash blankets fields, and a crater collapses into a caldera. After that, slower processes take over. Ash and lava weather into deeply fertile soil, rivers cut new channels through fresh rock, and plants recolonise. A volcanic landscape is therefore the product of sudden tectonic processes and slow weathering, erosion and ecological change working together.

7

Quick check

Part 7 of 19

Quick check

Sticky, gas-rich magma at a destructive boundary produces…

8

Quick check

Part 8 of 19

Quick check

Which is a long-term benefit of volcanic activity?

9

Reset break

Part 9 of 19

Pause

That's sitting 1 of 2 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
10

Learning cycle

Part 10 of 19

Learning cycle 2 of 2

Living with the risk

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

11

Explore the idea

Part 11 of 19

Learn

The reasons people stay

Volcanic soils give unusually high crop yields, which supports dense farming populations. Geothermal heat provides cheap electricity and hot water, as in Iceland. Tourism brings jobs, and minerals such as sulphur and copper are mined. Many people simply cannot afford to move, have family and work where they are, or judge the risk to be small because eruptions are rare in a human lifetime.

12

Explore the idea

Part 12 of 19

Learn

Reducing the risk

Volcanoes can be monitored: seismometers detect small tremors as magma moves, gas sensors pick up rising sulphur dioxide, and satellites measure the ground bulging by centimetres. Combined with hazard maps, exclusion zones, evacuation plans and drills, monitoring turns a disaster into a managed evacuation. Wealthier countries can afford dense monitoring networks, which is a large part of why similar eruptions kill very different numbers of people.

13

Quick check

Part 13 of 19

Quick check

Which monitoring evidence suggests magma is rising?

14

Quick check

Part 14 of 19

Quick check

Why do two similar eruptions kill very different numbers of people?

15

Common mix-ups

Part 15 of 19

Common mix-ups

Things people often get wrong

  • All volcanoes erupt explosively — shield volcanoes usually produce slow lava flows people can walk away from.
  • People living near volcanoes are simply careless — most have strong economic, family or financial reasons to stay.
  • Monitoring predicts the exact day of an eruption — it gives probabilities and warning signs, not certainty.
16

Challenge round

Part 16 of 19

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

17

Challenge round

Part 17 of 19

Game · Fill the gaps

Finish the sentences

Choose the word that belongs in each gap.

After that, slower ____ take over.

18

Mastery quiz

Part 18 of 19

Marked quiz

End of lesson quiz: Volcanoes, and why people stay

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

  1. 1. Runny lava builds which volcano shape?

  2. 2. A caldera forms when…

  3. 3. Geothermal energy uses…

  4. 4. Which process turns fresh lava into fertile soil?

  5. 5. An exclusion zone is used to…

  6. 6. Volcanic landscapes are shaped by…

19

Lesson round-up

Part 19 of 19

Lesson round-up

Ready when you are

Quiz score

Not sat

Games

Not played

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

Do the work

Your written work for this lesson

This is the part you'd do in your book at school. Pick the pieces below, write here or on paper, and photograph anything you draw or work out.

Case study

Flooding on the River Calder

The town of Harbrook sits where a steep valley opens onto a flat floodplain. In December 2015, 120 mm of rain fell in 36 hours onto ground that was already saturated. The river rose 2.4 m in five hours, and 380 homes and 54 businesses flooded. Two roads and the railway closed for eleven days.

Geographers pointed to physical causes — steep slopes, impermeable rock, heavy rainfall — and human causes: moorland drained upstream, new housing built on the floodplain, and drains designed for smaller storms.

Since then the town has planted 40 hectares of woodland upstream, built leaky dams in small streams, and raised flood walls to 1.8 m. In the storm of 2020 the peak river level was 0.3 m lower and 40 homes flooded, not 380.

Written for Good Learning Co.

Reading questions

  1. List two physical and two human causes of the 2015 flood.
  2. Explain how planting woodland upstream lowers the river's peak level.
  3. Using the figures, judge how successful the scheme has been. Quote data in your answer.

  • Case study notes

    Writing

    Write the place, the facts and the figures from this lesson so you can revise them later.

    Half a page

  • Explain answer

    Writing

    Answer in full sentences, giving causes and effects. Use one figure or place name as evidence.

    8–10 sentences

  • Map or sketch

    Diagram

    Draw the map, cross-section or field sketch with a key, title and labels, then photograph it.

    1 map with a key

  • Data work

    Working out

    Plot your figures as a graph on paper and write one sentence about the pattern.

    1 graph + 1 sentence

Saved as you type.

Part 1 of 19 · Watch & discover

How this is going

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    Understand how geographical processes interact to create distinctive human and physical landscapes that change over time

  • Not looked at yet

    Understand tectonic processes and hazards, including earthquakes and volcanic activity

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