Question

the metamorphic rock quartzite is formed from the sedimentary rock sandstone. which statement is true? quartzite and sandstone can combine to form the igneous rock, basalt. sandstone contains larger grains than quartzite. quartzite and sandstone contain the same minerals. quartzite can turn back to sandstone by melting.

Explanation:

Quartzite is formed from sandstone through metamorphism. They are composed mainly of quartz minerals. Igneous rocks like basalt form from cooling magma/lava, not from combination of quartzite and sandstone. Sandstone has loose - packed grains and quartzite is more compact, so sandstone doesn't have larger grains. Melting quartzite would not turn it back to sandstone as the processes are different.

Answer:

Quartzite and sandstone contain the same minerals.