7. Marcie fills a graduated cylinder with 15.0mL of water. Paul finds the mass of a marble to be 2.21g, then drops the marble into the graduated cylinder. If the meniscus on the cylinder is
now at 16.3mL, what is the density of the marble?

Which set of characteristics best describes igneous rock? a) largest type of rock, made of organic matter, hardest type of rock b) least abundant type of rock, made of other rocks, made mostly of minerals c) found on all continents, contains wavy bands of stripes, contains fossils d) most abundant type in earth's crust, made of magma/lava, contains no fossils

11. phosphorus-32 is radioactive and has a half life of 14 days. how much of a 124 mg sample of phosphorus-32 is present after 56 days? a) 7.75 mg b) 15.5 mg c) 31.0 mg d) 62.0 mg

  the mississippians were considered to be  horticulturalists, which means they were