Applications, Connections, and Contributions

Example

Name what a water-plant operator has to know and the problem it solves.

1. Water-plant operator: what sizes of particle each layer traps, and what the day's raw water is carrying — so the water leaving is safe.

Example

Name what a heating technician has to know and the problem it solves.

1. Heating technician: how warmth escapes through different materials, and which runs lose the most — so the fix goes where the loss is.

Example

Name what a bridge inspector has to know and the problem it solves.

1. Bridge inspector: how water and air eat into stressed steel, and which streaks mean trouble is deepening — so a crack is caught early.

Example

Plan a creek survey using science, math, geography and language.

1. Science: which living things indicate clean water; how to sample without harming them.
2. Math: counts per net-sweep, averaged across sites; a bar graph by site. Geography: a map of the sites and what drains into each.

Example

Explain the science in chuño freeze-drying and a qanat.

1. Chuño: potatoes left out through freezing nights and sunny days lose their water, so they keep for years without rotting.
2. Qanat: a gently sloping tunnel brings groundwater from hills to fields by gravity, shaded from evaporation.

Example

Explain the science in a polder.

1. Polder: dikes hold the sea back and windmills pump the land dry, so fields sit below sea level. People worked things out by observing and testing, and passed them down the generations.

Summary

• Trades know what layers trap, where warmth leaks, what streaks mean.
• Subjects combine in a survey.
• Chuño, qanats, polders: observed, tested, passed down.