Tea bag and archimedes’ screw: what they have in common

1. Step 1. Tea bag — has part — Filter paper. Porous paper.
2. Step 2. Filter paper — is part of — Paper coffee filter. It holds back the grounds.
3. Step 3. Paper coffee filter — works like — Water filter. Filtering a liquid through a porous medium.
4. Step 4. Water filter — is part of — Drip irrigation. Water is filtered before the drippers, or the thin tubes clog.
5. Step 5. Drip irrigation — is a kind of — Irrigation. A kind of irrigation.
6. Step 6. Irrigation — uses — Archimedes’ screw. The Archimedes’ screw lifted water for irrigation.

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