Students explain seasons by the Earth's axial tilt, link tilt to the height of the noon sun and day length, and use opposite hemispheres and the distance data to reject the distance explanation (AC9S7U03, node 4, a hinge node).
Load these into Waypoints Prepare: choose Load URL and paste the copied address, or download the file and import it. In Prepare, the worksheet's Teacher edition shows the answers; the student copy hides them.
Engage and Explore 7 min · Explain 9 min · The other hemisphere 3 min · Evaluate 3 min · Wider adds about 4 min
A concept tutorial for introducing or revising the idea; pair it with a torch shone straight and at a slant onto grid paper. Set the width with ?width=minimum, typical (default) or wider.
The hinge misconception is that summer happens because the Earth is closer to the sun. The board shows the real distance for each date: closest (147 million km) in early January, farthest (152) in early July.
Board notes: day lengths and noon sun heights are calculated for each city's latitude and date (ignoring the bending of light by the air, which adds a few minutes). The wider tier's tilt slider is a "what if": the real tilt is 23.4°. The Kakadu six seasons are described by Parks Australia with Bininj/Mungguy people; check local sources if you want students to explore a calendar from your own area.
Explaining seasons by tilt, not distance. When a student says Earth is closer in summer, ask what the board says the distance is on 22 December and 22 June.
| What you will see | A question to ask | The fix |
|---|---|---|
| A student says the Earth is closer to the sun in summer. | What does the board say the distance is on 22 December and 22 June? | Closer in December by about 5 million km, out of 150: and London is in winter then. |
| A student says summer is hotter only because days are longer. | What about the height of the noon sun? | Both: a higher sun concentrates the light, and longer days give more hours of it. |
One possible solution for each task. Other correct programs are fine.
Open task: any program that does what the step asks.
Open task: any program that does what the step asks.
Open task: any program that does what the step asks.
Stretch: Why are the days around the equinoxes (about 20 March and 22 September) close to 12 hours everywhere?
Support: Give a table: date, daylight, noon sun height, distance, season, to fill for December and June.
For a student who has done the lesson and is still stuck. They paste it into an AI tool your school allows; it asks questions about this lesson's one idea and doesn't give answers. Students see it on the course recap page only through a link ending in ?coach=1: recap with coach prompts.
You are a patient science coach for a Year 7 student in Australia. Help me understand ONE idea only, from the lesson "Why is summer hot?". The idea: Seasons: I can explain seasons as caused by axial tilt and correctly relate tilt to solar angle and day length at different latitudes. What understanding looks like: - Explains seasons as caused by axial tilt, not distance from the sun - Links tilt to solar angle and day length - Correctly identifies opposite seasons in Northern and Southern hemispheres Mistakes students often make here: - A student says the Earth is closer to the sun in summer. - A student says summer is hotter only because days are longer. How to coach me (rules from the Waypoints Kit coach): - Ask me one short question at a time (2 to 4 sentences) and wait for my answer. Never give me the answer before you have heard my thinking, and don't hide the answer inside your question. - Start in Discover: ask me to explain the idea in my own words, or to predict what happens in a simple example. I can switch any time: "teach it back" (you play a beginner and I explain), "spot the flaw" (you show me an answer with one common mistake and I find it), or "check" (I explain, and you tell me what is solid and what to revisit). - If I am stuck or say "just tell me", ask what I think first, then give a small hint or a simpler example. Explain only after I have had a real go. - If I seem to be missing the idea that comes before this one (Eclipses: solar and lunar), check it quickly, then come back. - Stay in this idea: don't teach later ideas or add extra content. If I ask about something else, say it is for another lesson and bring me back. - After you help, ask me one reflective question, such as how I know my answer is right or what I would check. - Praise my effort and method, not my ability. - You can be wrong: if I rely on something you said, remind me to check it against my notes or the lesson. If you don't know, say so. - Use simple words. - Stop when I can explain the idea in my own words and get one new example right. Then tell me to go back to the lesson "Why is summer hot?".
Explain why Canberra is hotter in December than in June.
In December the Southern Hemisphere leans towards the sun (the tilt), so the noon sun is higher, concentrating the light, and days are longer. It isn't distance: the Earth is actually slightly closer to the sun in January.
Next: the moon (nodes 2, 3 and 5).
In class: the torch-and-grid-paper practical; a sunrise and sunset table for your town from the Bureau of Meteorology or Geoscience Australia.