Blood flow causes vibrations in the heart chambers and valves and produces sounds that can be heard with a stethoscope Evaluate which of these does NOT necessarily contribute to the sounds detected by the stethoscope as blood passes through the heart

emerging idea only occurs as a raw idea that could appear out of nowhere. meanwhile, to reach scientific consensus , that idea must be structured and tested over and over again through various experiments. the scientific consensus transforms the raw idea into idea that is more reliable through the process of scientific elimination.

measuring light intensity

light meters can be used to measure light intensity. the meter is held at the soil surface and pointed in the direction of the maximum light intensity, and then the meter is read.

errors can be made when measuring light intensity by accidentally shading the light meter. the reliability of the results can be checked by taking many samples.

answer; cnidarians;