How many different spectral lines could be emitted if mercury vapor were excited by photons with 6.67 eV of energy? (Hint: An electron couldmove, for example, from energy level Es to E3, then from Ez to E2, and
then from Ez to Ep.)

Which of these statements best explains how the hydrosphere interacts with the atmosphere to affect global climate? mountains block rain clouds and cause changes in global rainfall and evaporation. humans burn fossil fuels to produce greenhouse gases which cause global warming. humans cut down trees which affects the amount of oxygen in different parts of the globe. greenhouse gases, like carbon dioxide, dissolve in oceans and prevent global warming.