Students describe Earth's layers and their states, explain that temperature and pressure increase with depth, and identify the lithosphere as the rigid outer layer (AC9S8U03, node 1, 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 8 min · Explain 7 min · Evaluate 3 min · Typical adds 1 min, Wider about 2 min
A concept tutorial for introducing or revising the idea. Set the width with ?width=minimum, typical (default) or wider.
The hinge misconception is a liquid mantle ("a sea of magma"). If the mantle were liquid, rigid plates wouldn't make sense. The board describes it as solid rock that flows very slowly.
Board notes: the default view enlarges the outer layers so they can be clicked; "Show it to scale" draws true thicknesses. Temperatures and pressures are rough textbook values joined smoothly (for example, about 1300 °C at the base of the lithosphere, about 5400 °C at the centre). Depths: continental crust about 35 km (oceanic about 7), lithosphere about 100 km, asthenosphere to about 350 km, core–mantle boundary 2890 km, inner core from 5150 km.
Accepting a solid mantle that still flows. When a student says lava comes from a liquid mantle, ask where the board says melting happens.
| What you will see | A question to ask | The fix |
|---|---|---|
| A student says lava comes from a liquid mantle. | Where does the board say melting happens? | Only in small pockets, where pressure drops or water is added: magma, not a whole liquid layer. |
| A student thinks the inner core must be liquid because it's hottest. | What else increases with depth? | Pressure: enough to keep it solid. |
Stretch: Australia sits on very old, stable lithosphere. Why might that mean few volcanoes and big earthquakes here?
Support: Give a cross-section outline with the layer names and states in a box to place.
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 8 student in Australia. Help me understand ONE idea only, from the lesson "What's inside the Earth?". The idea: Earth's internal structure — layers, states and the lithosphere: I can describe Earth's layered internal structure, identify the state and composition of each layer, and explain that the lithosphere is the rigid outer layer. What understanding looks like: - Names Earth's main internal layers and describes the state (solid/liquid) of each - Explains that the lithosphere is the rigid outer layer (crust + upper mantle) - States that temperature and pressure increase with depth Mistakes students often make here: - A student says lava comes from a liquid mantle. - A student thinks the inner core must be liquid because it's hottest. 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. - 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 "What's inside the Earth?".
Name the only liquid layer and explain what the lithosphere is.
The outer core. The lithosphere is the crust plus the rigid top of the mantle: the rigid outer shell broken into plates.
Next: what moves the plates (node 2). In class: a hard-boiled egg with a cracked shell as a model of the lithosphere (and where it breaks down).