When you are in Death Mountain from Zelda:The Twilight Princess.....?

Question

When you are in death mountain, how do you defeat the boss when you are standing on the wobbly rock in the lava. i keep on dying so please answer ASAP

Answer 1

I'm assuming you're referring to the goron guard in the goron mines. There is a simple tactic to this.

Firstly, be sure that you are wearing the oiron boots. Next, stand close to the edge of the platform and wait for him to come close. When he raises his hand, attack him with your sword about four times. He'll then roll into a ball and roll at you. Now it's like tossing the goron's aside as you first climbed the mountain. Gra him and then throw him to the side, and hopefully into the lava. Do this three times and he'll let you through to your prize; the Hero's bow

Answer 2

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Death Mountain
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When you arrive, Midna will point out that the path is impassable, but she
can help you if needed. Go up the slight hill to the left and use Midna to
scale the wall. Continue up the path, killing Keese and shadow enemies along
the way. When you reach the second large wall, climb up the blocks to
continue. Up there, you will see steam shooting out of the ground and walls.
Try to avoid those; you won't take damage, but they can be rather annoying.

Use your senses to spot the dark insect, which will burrow into the ground.
Dig it up and kill it for its tear. You will also see a Howling Statue here;
check it and perform the proper howl to make the golden wolf appear. It will
tell you to return as a human, and will mark its location on your map (the
Ordon Woods spring).

Now, head further north along the path, being cautious of the steam leaks. Up
ahead you will be forced to face off against four of those shadow beings. One
of them is hiding behind an alcove surrounded by a barrier; try to kill that
one first. Defeat two of them, then use the energy field on the remaining
ones to finish them off. After that, use your senses and check the northern
wall to find another dark insect. Dash into the wall, then kill the bug and
grab its tear. Now, hop onto the small ledges to the west and use Midna to
reach the upper platforms (wait until the steam shooter stops first).

Follow the path until you reach some more steam leaks and a ramp to the
right. Head up that ramp and use Midna to jump to the next ledge. From there,
go forward and drop into the lower arena. Defeat the shadow enemies, then use
your senses to find and kill the final dark insect for its tear.

Answer 3

...use your iron boots, hit him with your sword just before he attacks, and stop him with A when he rolls at you. He'll fall in the lava. Do this 3 times and you win.