scraping an object may cause small particles to break off of that object & a rock is a kind of object -> piece a stone june effect big willow to fix off the part stone scraping a rock may cause small particles to break off the whole rock  scraping a rock may cause small particles to break off the whole rock & glacier may scrape rocks when it moves -> hill can quart a stone and effect big freezes to fix off the part stone glacier can scrape a rock and cause small particles to break off the whole rock  very big candles / chart are hunt of of big water & soil is made of very small rocks / minerals -> soil is made of small particles of rock / minerals soil is made of small particles of rock / minerals  hill can quart a stone and effect big freezes to fix off the part stone & soil is made of small particles of rock / minerals -> the small particles of a rock scraped by the glacier can make up soil