Scientists base many of their investigations on questions that test accepted theories. which outcome of an investigation would cause a scientist to ask a different question? a)the observed results are different from the expected results. b)the investigation had many sources of error. c)another scientist proposed the same theory. d)the expected results could be explained in different ways.

When you expect something, but get something else, you have a reason big enough to ask new questions and start a new investigation.

Example:

If you create a tree by artificially breeding different species, and then plant it with certain expectations in width, size, bark width, leaf shape, etc. and things go differently, a new investigation might begin with a whole new load of questions.

Hope it helped,

Happy homewok/ study/ exam!

covalent bonding is a form of chemical bonding between two non metallic atoms which is characterized by the sharing of pairs of electrons between atoms and other covalent bonds.

i think that d. wind is the answer.   i missed the question when i answered a. currents.