What other properties would you use to identify a substance which has the same density value os another substance?

primary succession occurs in essentially lifeless areas regions in which the soil is incapable of sustaining life as a result of such factors as lava flows, newly formed sand dunes, or rocks left from a retreating glacier. secondary succession occurs

request for reexamination

instead of copying and pasting things off of tests or work done on computer which im sure you did, try and read over the question carefully