¿Qué puedo hacer?
tipo de documento Ciencias de la Tierra y Medioambiente - Experimento/Práctica
Acerca de este recurso...
Tumbling is a technique used for smoothing and polishing a rough surface on small particles. Professional rock polishers help jewelers polish stones by imitating the abrasion of rocks in nature. The natural process happens over hundreds of years, and tumblers speed it up by acting like liquid sandpaper. Softer rocks like limestone and sandstone polish easier while granite and quartz require weeks of tumbling.The independent variables in this experiment are the types of rocks. The dependent variable is the effect of the tumbler on the types of rocks. The constants are the jars, the water and the process.The goal of this project is to demonstrate the abrasions of rocks in nature and the variations between types of rocks. The process occurs naturally when water rushes against rocks, when they are swept along in a current or when wind blows sand against them. The tumbler does the work of nature by forcing the rocks to grind against each other.
It is an educational content by education.com.
By clicking on the title of this resource, you will be redirected to the content. If you want to download the project, you just have to join the website, which now is for FREE.
Fecha publicación: 12.5.2016
Se respeta la licencia original del recurso.