Scientists must be able to repeat an experiment and get very similar results; otherwise their conclusions will be questioned. if the results of a repeated experiment are different from the original results, the results of the experiment lack bias . are precise. lack controls. are flawed.

he movement of air through earth's or any planet's atmosphere is called wind, and the main cause of earth's winds is uneven heating by the sun. this uneven heating causes changes of atmospheric pressure, and winds blow from regions with high pressure to those with low pressure.

i hope this : )

voluntary muscles are controlled by the cerebellum.