LA FISICA DEGLI ORDINI DI GRANDEZZA
Riflettere alla svelta! L’arte di stimare (parte seconda)
(Traduzione da Quantum, marzo-aprile 1991, a cura di C. Marchi Trevisi)

This article is an example of the physics activities for interested youngsters offered by the journals KVANT and QUANTUM. It contains a series of unusual solved problems, appropriate for high-school students, the solution of which requires making order-of-magnitude estimations.