Is a rock that changes from brown to red chemical or physical weathering

Which statement best describes the nature of science? a. science discoveries using the latest technology are the most valuable. b. scientific theories and laws are based on beliefs and popular opinion. c. scientific ideas change over time as new information is discovered. d. science is superior to other fields such as art, philosophy, and music. i think its c

Why should the united state be concerned about air pollution in china?

Which part of the cell is affected by the movement of molecules through diffusion, osmosis and active transport?