Yes They Are Alike :D
They are alike in shape , but volcanoes have lava's
Volcanoes
they are alike they both have sparks and spread like normal
they are both in volcanoes
they are volcanos
The Oceans
they dont
Volcanoes.
Active volcanoes and dormant volcanoes both have a likely chance to erupt and have erupted in the past.
Both the Arctic and the Southern Ocean are polar oceans.
They are both along the Ring of Fire.
Earthquakes and volcanoes both occur in land and ocean. =)