Bones are evidence of what per-existing a: animal b: plants c: plants and animals d: neither plants nor animals

Which process does not require the presence of a physical substance in order to transfer heat? air in the atmosphere is heated by the ground. this warm air then rises, and cooler air falls. this is an example of what type of process? how is conduction different from radiation?

Mercury metal is poured into a graduated cylinder that holds exactly 22.5 ml the mercury used to fill the cylinder mass in 306.0 g from this information calculate the density of mercury

How do you determine the degree of a power function from a table? when do you know you have successfully determined the degree of the power function?