Very urgent! highly appreciate this < 3 question one: what quantity measures the amount of matter in an object? a) volume b) temperature c) mass d) density (i think the answer is density, just check it) question 2: complete this sentence. if volume remains the same while the mass of a substance the density of the substance a) increases, stay the same. b) decreases, stay the same. c) decreases, increase. d) increases, increase.