"the composition of magma will when it erupts and turns into lava."

ANSWER:

The composition of magma will remain the same when it 'erupts and turns into lava'.

EXPLANATION:

As we understand magma is the name for the molten rocks which are present and found in the crust of the earth. Now, the process goes as magma goes towards the 'surface of the earth' and that state will be called lava. The reaching of magma to lava is happened through vent or a hole of a mountain causing eruption.

Answerhave flowing water either episodically or during only a portion of the year;