Engineers aim to reduce earthquake damage, not make every building earthquake-proof. Bracing and strong connections are two design features. Tsunami detection and warnings are a separate system. A planning sheet can compare these roles, but it does not certify buildings or tell a family how to evacuate. Safety: Classroom analogy only, not engineering certification or emergency advice. Stop: Stop at the fictional planning note. No shaking furniture, drills, structural inspection, or route planning.

Materials: Paper; Pencil; Ruler 1. Draw two matching 6 cm squares as building-frame diagrams. Leave A open. Add a diagonal from bottom left to top right in B. Label B Brace. Draw A again with its top edge shifted 1 cm right to make a slanted quadrilateral. Mark that this is a geometry analogy, not a strength test. 2. Compare the shapes: a square without diagonal restraint can change angle; a fixed-length diagonal constrains that change. Write one reason a real structure also needs suitable materials and secure connections. Do not build or shake a tower. 3. Copy and connect four tsunami-system cards: earthquake instruments detect seismic activity; sea-level instruments help detect and check waves; warning centres assess evidence and issue messages; communities use official plans and practised procedures. State that nearby waves may leave little warning time. 4. Write a fictional town planning note: one building feature, one detection feature, and one preparation feature. Include a separate eruption example: officials prepare route and communication plans for volcanic hazards. Do not choose real routes or practise a drill. Done: Two labelled frame diagrams, one geometry comparison, the four-card warning chain, and a three-role town note with an eruption planning example are complete. Proof: Keep the sheet. Note help measuring, supplying terms, or ordering the chain. No model test score is a safety rating. Stop: Stop at the fictional planning note. No shaking furniture, drills, structural inspection, or route planning.