Irrigation and atomic clock: what they have in common

1. Step 1. Irrigation — includes — Drip irrigation. A kind of irrigation.
2. Step 2. Drip irrigation — has part — Water filter. Water is filtered before the drippers, or the thin tubes clog.
3. Step 3. Water filter — is made of — Silica (sand). Slow filters are layers of sand and gravel.
4. Step 4. Silica (sand) — is material for — Quartz clock. The resonator is a quartz crystal.
5. Step 5. Quartz clock — evolved into — Atomic clock. The quartz oscillator is tuned to an atomic standard.

Open Evothings