8. Why is the snow crunches when walking? The main reason – the crystals break. The crunch depends on the temperature of snow. The lower it is – the louder the sound. By the way, squeak-like crunch snow can be obtained by compressing the mixed salt and sugar. Previously, this method was often used when shooting films. Once the wife of French King Louis XIV Madame Maintenon due to her woman’s reason decided to sled in the middle of summer. The next morning, she arranged some miles of “snow” route made of salt and sugar on the roads of Versailles.