S2 Geography | Weather and Climate Elements: Tutor Prep Guide | Four instruments, four-step climograph, four common mistakes

2026-11-12

Tutor lesson-prep guides · Secondary Geography

Students call one wet afternoon “the climate” and treat the bars and line on a climate graph as decoration. This lesson does three things only: split weather from climate with one definition, show which instrument measures which element, and turn a climate graph into one written conclusion in four steps.

Objectives — By the end students can: (1) separate weather from climate using “now” versus “thirty-year average” and sort five everyday sentences correctly; (2) name the element, unit and siting rule for the thermometer, rain gauge, wind vane and hygrometer, including why the thermometer sits in a Stevenson screen about 1.2 m above ground; (3) read a climate graph in four steps (axes, rainfall bars, temperature line, seasonal conclusion) and write a conclusion of at least twenty words; (4) calculate a daily temperature range (31 minus 23 gives 8 degrees) and state that wind direction is named after where the wind comes from.

01 Prerequisites (3-minute check)

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

Skill	Quick check	Pass mark
Unit conversion	How many millimetres are in one centimetre?	Ten millimetres
Reading a graph	What does each axis of a climate graph show?	Months on the horizontal axis, values on the vertical axis
Hong Kong seasons	Which months are wettest in Hong Kong?	Roughly May to September

02 Lesson flow (45 minutes)

Time	Stage	Tutor does	Student does
0-5 min	Sort first	Write five sentences on the board and ask students to sort them into weather or climate; wrong ones stay on the left	Call out the sort and a reason
5-15 min	Four instruments	Cover thermometer, rain gauge, wind vane and hygrometer with element, unit and siting rule	Fill a four-row table
15-26 min	Climograph in four steps	Model axes, bars, line, conclusion and write “summer wet, winter dry” as one sentence	Repeat the four steps on one graph
26-36 min	Number work	Use a maximum of 31 and a minimum of 23 to model the daily range and the subtraction order	Calculate two daily ranges
36-41 min	Four mistakes	Post four wrong answers; groups name the faulty step; the tutor adds one correct line each	Identify one error per answer
41-45 min	Exit check	Collect three questions, mark live, name the act to reteach next lesson	Hand in three answers

03 Teaching script (read it out)

Scene 1: Act 1: Weather is now, climate is the average

Open with the most expensive error: treating one wet afternoon as climate. Weather is the state of the atmosphere now or today and it changes; climate is the average and pattern of thirty years or more, so one rainy day cannot change it. “It is raining heavily today” is weather; “Hong Kong summers are wet” is climate. The test is one question: does the sentence describe right now, or a long-term pattern? Students often write “this year was very hot” as climate, but a single year is still a weather record. Circle the time words in the question, because today, this month, every year and over many years decide the answer.

Weather is now; climate is a thirty-year average.

Scene 2: Act 2: Four instruments, four units, one siting rule

Match instruments to elements one to one: thermometer for air temperature in degrees Celsius; rain gauge for rainfall in millimetres, not centimetres; wind vane for wind direction, named after where the wind comes from, so a north wind blows from the north, not towards it; hygrometer for relative humidity as a percentage. The thermometer must sit inside a Stevenson screen about 1.2 m above the ground, louvred for ventilation and shaded from direct sun, because the ground and sunlight would push the reading above the true air temperature. Writing “the thermometer is placed on the ground” is admitting the reading cannot be trusted, so state the reason, not just the position.

Four instruments, four units; wind from, not towards.

Scene 3: Act 3: Four steps turn a graph into one sentence

The order of the four steps matters. First read the axes: months run along the horizontal axis, rainfall in millimetres on one vertical axis and temperature in degrees on the other; swapping them ruins everything. Second read the rainfall bars to find the wettest and driest months. Third read the temperature line for the hottest and coolest months. Fourth combine both into a seasonal conclusion: rain concentrated from May to September with the peak temperature in the same months means a summer-wet, winter-dry monsoon pattern; rain spread evenly with a flat temperature line means rain all year. The conclusion must be one full sentence with both the rainfall season and the temperature range. For example, 18 degrees and 60 mm in January against 29 degrees and 300 mm in July gives hot wet summers and mild dry winters.

Axes, bars, line, conclusion, with numbers in it.

04 Question types and worked steps

Type	Example	Steps	Answer
Instrument matching	Which instrument measures relative humidity, and in what unit?	(1) Identify the element asked (2) Match it to one instrument (3) Write the unit as a percentage (4) Add one siting rule	A hygrometer, measured as a percentage
Weather or climate	Is “Hong Kong summers are wet” weather or climate? Why?	(1) Circle the time words (2) Decide between now and long-term pattern (3) Answer climate (4) Justify with the thirty-year average	Climate, because it describes a long-term seasonal pattern
Climograph reading	A place has 18 degrees and 60 mm in January and 29 degrees and 300 mm in July. Describe its climate.	(1) Read both axes (2) Find the wettest and driest months (3) Find the hottest and coolest months (4) Combine into one sentence	Hot wet summers with mild dry winters
Daily range	A day reaches 31 degrees and falls to 23 degrees. What is the daily range?	(1) Copy the maximum and minimum (2) Subtract the minimum from the maximum (3) Add the unit (4) Check the order	8 degrees Celsius

Sanity check (teach this): Sanity checks: (1) Rainfall is measured in millimetres; answering centimetres is wrong, and one centimetre is ten millimetres. (2) Wind direction is named after its source, so a north wind comes from the north. (3) The thermometer belongs in a Stevenson screen about 1.2 m up, ventilated and shaded. (4) A daily range is always maximum minus minimum; a negative answer means the order is reversed. (5) A climate conclusion needs both the rainfall season and the temperature range; adjectives alone do not count.

05 Independent practice (3 questions)

Question	Answer	What to watch
Which instrument measures rainfall and in what unit?	A rain gauge, in millimetres	Check the unit is not centimetres
Is “it is raining hard today” weather or climate?	Weather, because it describes a moment	Check the time word was used
A place has even rainfall all year and a small annual temperature range. Describe its climate.	Rain in all seasons with a small annual range	Check both rainfall and temperature are stated

06 Common mistakes and what to say

Mistake	Student writes	Say this
Calling weather climate	“It rained today, so the climate is wet”	One day is weather; climate needs a thirty-year average.
Rainfall in centimetres	The gauge reads 30 centimetres	Rainfall is in millimetres; one centimetre is ten millimetres.
Wind direction reversed	A north wind blows towards the north	Wind is named after where it comes from.
Temperature only conclusion	This place is very hot	State the rainfall season and the temperature range together.

07 Homework (paper, section and question numbers)

Secondary Geography chapter index — Weather and climate come before rivers and climate change
All prep guides — Other subjects use the same four-step graph routine
Redo this lesson — Take one city climate graph, run the four steps and write a conclusion of at least twenty words

08 Exit check (last 5 minutes)

Question	Answer	Decision
How do weather and climate differ?	Weather is now; climate is a thirty-year average	Reteach Act 1 if unclear
Where does the thermometer go?	In a Stevenson screen about 1.2 m up, ventilated and shaded	Reteach Act 2 if answered “on the ground”
What are the four climograph steps?	Axes, rainfall bars, temperature line, seasonal conclusion	Reteach Act 3 if a step is missing

09 Tutor FAQ

Can I teach instruments without the graph?

No. Instruments measure single elements, while the graph is exactly the skill of combining them into a seasonal conclusion, so teach both in one lesson.

Students keep subtracting in the wrong order. What helps?

Have them write the maximum and minimum on separate lines before subtracting; a negative answer is circled and corrected by the student.

Do they need every climate type?

Three are enough at S2: rain all year, summer-wet winter-dry, and winter-wet summer-dry. The rest belongs to senior climate change units.

Find a tutor — free Tutor Registration →

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.