DSE Geography — Global Warming and Extreme Weather Teaching Guide (for tutors) | Trend reading, frequency counts, mitigation versus adaptation

2026-11-02

Tutor lesson-prep guides · Secondary Geography

Students answer every climate question with the earth is getting hotter and the ice is melting, while the question asks for trend, frequency and uncertainty. This lesson turns three countable moves into habits.

Objectives — Students can: (1) write a complete trend in three boxes, start, end and interval, using carbon dioxide from 280 to 420 ppm, up 50 percent; (2) separate frequency, intensity and interval when describing extreme weather, for example hot nights rising from 25 to 45 a year, up 80 percent; (3) state mitigation and adaptation in one sentence each, with a checkable example, since 400 Gt of budget divided by 40 Gt a year leaves 10 years.

01 Prerequisites (3-minute check)

If any of these fails, fix it before the lesson starts.

Skill	Quick check	Pass mark
Weather and climate	What is the difference between today at 33 degrees and the climate	Climate uses a 30 year average
Percentages	280 rising to 420 is what percentage	Denominator 280, so 50 percent
Chart units	What do ppm and degrees measure	Concentration and temperature anomaly

02 Lesson flow (45 minutes)

Time	Stage	Tutor does	Student does
0-6 min	Diagnostic three	Ask weather versus climate, hot night threshold, black rain standard	Answer orally, write the first answer down
6-16 min	Trend in three boxes	Model start, end, interval on a carbon dioxide curve	Mark three points, write units
16-26 min	Frequency and intensity	Hand out one district hot night and rainfall record	Count in two columns, take averages
26-34 min	Four question types	Model each type, students copy the first row	Finish the first two rows
34-42 min	Three independent items	No hints, only timekeeping	Working and units line by line
42-45 min	Exit check	Read three items, mark together	All three right before leaving

03 Teaching script (read it out)

Scene 1: Weather is one day, climate is thirty years

Set the rule first: climate always needs a 30 year average, weather is a single day.
So one black rainstorm proves nothing about warming, but black rain days rising from 2 to 4, up 100 percent, is usable evidence.
No student may write the impact paragraph until they can state the difference.

Ask students: give one sentence of weather and one of climate.

Scene 2: Frequency and intensity are two different columns

An event can become more frequent without becoming stronger, or stronger without becoming more frequent, so answers need two columns.
Hot nights, minimum temperature at or above 28 C, rise from 25 to 45, up 80 percent; days with hourly rainfall at or above 70 mm rise from 2 to 4, up 100 percent.
The common trap is claiming more typhoons without data: signal eight hours rose from 30 to 48 hours a year, up 60 percent, which is hours, not count.

Ask students: which word marks frequency and which marks intensity.

Scene 3: Mitigation cuts emissions, adaptation cuts losses

Mitigation means fewer greenhouse gases: renewables, efficiency, carbon pricing.
Adaptation means living with what is already happening: sea walls, ventilation corridors, cooling centres.
Attach numbers to each idea: sea level rises 3.4 mm a year, so 30 years adds 102.0 mm (10.2 cm); warming of 1.1 C leaves 0.4 C to the 1.5 C goal, and 400 Gt of budget at 40 Gt a year lasts 10 years.

Ask students: is a sea wall mitigation or adaptation, and why.

04 Question types and worked steps

Type	Example	Steps	Answer
Data description	Carbon dioxide from 280 to 420 ppm	Start, end, interval, percentage	All four parts needed
Explanation	Why nights warm faster than days	Physical layer then urban layer, heat island plus 2.0 C	One proof per layer
Impact	Sea level rise on coastal districts	Start from 3.4 mm a year times 30 years	Calculate before judging
Management	One mitigation, one adaptation	Measure, target, limitation	Limitation never blank

Sanity check (teach this): Percentages need a denominator: 50 percent is 140 over 280.
Rates need a time interval: 3.4 mm is per year.
Frequency and intensity stay in separate columns.
The carbon budget is an estimate, so write about 10 years and state the constant-emissions assumption.
The ocean takes up about 90 percent of the extra heat, which is why sea temperature and sea level respond slowly.

05 Independent practice (3 questions)

Question	Answer	What to watch
Carbon dioxide from 280 to 420 ppm, percentage rise	50 percent	140 divided by 280
Sea level at 3.4 mm a year for 30 years	102.0 mm, that is 10.2 cm	Multiply, then convert
400 Gt left at 40 Gt a year	10 years	400 divided by 40

06 Common mistakes and what to say

Mistake	Student writes	Say this
Using one day as proof of climate change	Yesterday was a black rainstorm, so that is global warming	One day is weather, a 30 year average is climate; you may claim frequency, never one date.
Global average only	The earth warmed 1.1 C, full stop	Hot nights here rose from 25 to 45, up 80 percent, which is the stronger local number.
Calling adaptation mitigation	Building a sea wall cuts emissions	A sea wall is adaptation; cutting emissions is mitigation.
Percentage with no base	It rose 80 percent	That is 25 to 45, so always quote the base.

07 Homework (paper, section and question numbers)

Past paper data response: climate change trends — Trend boxes first, then two explanatory layers
Practice: impact assessment over a 30 year horizon — Start from 3.4 mm a year
All lesson-prep guides — Compare the ten-section structure

08 Exit check (last 5 minutes)

Question	Answer	Decision
Rise from 280 to 420 ppm	50 percent	All three right: move on
3.4 mm a year for 30 years	102.0 mm	One wrong: redo the trend boxes
400 divided by 40	10 years	Two wrong: back to act three

09 Tutor FAQ

Is this too advanced for S6

The arithmetic is simple; the difficulty is writing units and denominators, so start with the safest marks.

Do schools use 1.5 or 2 degrees

Know both, and state which one your answer uses.

Is there practice material

The homework links the in-site geography practice pages with matching item numbers.

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A TutorZone lesson-prep guide. Written by the TutorZone team; questions and lesson flow are original and are not taken from any school or publisher material.