Explain hazards without prediction overclaims

Supplied materials

• All measurements and observations below are supplied classroom examples. They are not data from actual learners or a claim about a particular real site.
• Paper or a browser document for a labeled drawing, table or explanation.
• Worked problem inputs: Two equally exposed model buildings respond differently to matched shaking. Explain which risk factor changed.
• Assessment case 1: A mapped active fault can produce shaking, but no exact event-time evidence is supplied. What is warranted? Which inference or prediction is best supported?
• Assessment case 2: Which scientific label fits the specifically described step or feature? Supplied case: Homes lie in shaking area.
• Assessment case 3: Which scientific label fits the specifically described step or feature? Supplied case: Weak model building fails more easily.
• Assessment case 4: Which scientific label fits the specifically described step or feature? Supplied case: Claim gives exact earthquake time from no data.
• Assessment case 5: Which scientific label fits the specifically described step or feature? Supplied case: Coastal assets in a possible inundation zone.
• Assessment case 6: Two buildings face equal shaking but their modeled resistance differs. What explains a damage difference? Which inference or prediction is best supported?

Learn the idea

Hazard maps estimate patterns and exposure, not exact earthquake times. Ground motion, building design and location influence risk. Classroom models cannot certify structural safety.

Hazard means potential damaging Earth process. Exposure means people or assets in affected area. Vulnerability means susceptibility of exposed assets. Unsupported precision means exact-time claim without valid evidence.

For the supplied mechanism problem, Two equally exposed model buildings respond differently to matched shaking. Explain which risk factor changed. The matched shaking and exposure are fixed, while structural susceptibility differs. This demonstrates a vulnerability difference in the model, not an exact earthquake-time prediction.

1. Read the supplied problem and mark the structures, processes or quantities named: Two equally exposed model buildings respond differently to matched shaking. Explain which risk factor changed.
2. Draw the relevant boundary, pathway or comparison and label it using the scientific ideas above.
3. Write a causal explanation or calculation, showing how each observation supports the result.
4. Compare your reasoning with the worked solution; name a condition that would change or limit the inference.

Check your reasoning

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Take it further

New case: the same hazard affects an empty field and a populated district. Expected: hazard can be similar while exposure differs; greater exposed population does not establish a more intense Earth process.

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