a well-substantiated explanation of some aspect of the natural world that can incorporate facts, laws, inferences, and tested hypotheses every mass attracts every other mass number of complete waves that pass a point per second |
the movement of molecules in gasses and liquids |
the movement of materials into, out of, or within a cell |
formation of proteins using information coded on DNA |
changes in chemical substances involving bond breaking and/or bond forming resulting in different chemical substances |