What characteristic is shared by sunspots, solar flares, and coronal mass ejections? Select the two correct responses.(1 point) They appear as dark spots on the sun's surface.

They tend to occur during active periods of the solar cycle.

They are caused by outward fluctuations of the sun's magnetic field.

They appear as bright spots on the sun's surface.

Which transition by an electron will release the greatest amount of energy? oa ob oc od

Which one of the following research methods can show cause and effect

Global warming will produce rising sea levels partly due to melting ice caps but also due to the expansion of water as average ocean temperatures rise. to get some idea of the size of this effect, calculate the change in length (in m) of a column of water 1.45 km high for a temperature increase of 1.12°c. assume the column is not free to expand sideways. as a model of the ocean, that is a reasonable approximation, as only parts of the ocean very close to