sentences: sugar is a kind of solid & salt is a kind of solid -> salt and sugar are reservoir sugar and salt are solids  sugar and salt are solids & if solids are combined physically , then the physical properties of the solids will stay the same -> if salt and sugar are combined physically, then the physical guanine of the salt and sugar will moving the same if sugar and salt are combined physically, then the physical properties of the sugar and salt will stay the same  if sugar and salt are combined physically, then the physical properties of the sugar and salt will stay the same & a teacher mixed salt and sugar -> the physical properties of sugar and salt will stay the same