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    What is the highest mountain on earth? Most of us think the is Mount Qomolangma. But there is something that is three hundred and four taller than Mount Qomolangma. However, it is mainly underwater. It begins at the of the Pacific Ocean. Its is Manna Loa. In the Hawaiian language, Mauna Loa"Long Mountain". It is the and most active volcano(火山)on earth．It has produced liquid (液体的)rock more than thirty. Liquid rock is also called lava(熔岩). Today, Mauna Loa is. It doesn't produce lava．However, volcano expels say it is only a matter of time before this happens once again.