Sickle and atomic clock: what they have in common

1. Step 1. Sickle — is made of — Flint. Neolithic sickles were a wooden base with flint inserts.
2. Step 2. Flint — is material for — Flintlock. A flint strikes the spark.
3. Step 3. Flintlock — works like — Lighter. The same way of striking a spark.
4. Step 4. Lighter — uses — Piezoelectric effect. Piezo lighters.
5. Step 5. Piezoelectric effect — is used in — Quartz clock. The quartz resonator vibrates thanks to the piezoelectric effect.
6. Step 6. Quartz clock — evolved into — Atomic clock. The quartz oscillator is tuned to an atomic standard.

Open Evothings