which of the following are true? metamorphic rocks weather away to form sediment, which can then turn into…

which of the following are true? metamorphic rocks weather away to form sediment, which can then turn into sedimentary rocks. igneous rocks weather away to form metamorphic rocks. igneous rocks melt and then cool to form metamorphic rocks. sedimentary rocks melt and then cool to form igneous rocks.

which of the following are true? metamorphic rocks weather away to form sediment, which can then turn into sedimentary rocks. igneous rocks weather away to form metamorphic rocks. igneous rocks melt and then cool to form metamorphic rocks. sedimentary rocks melt and then cool to form igneous rocks.

Answer

Brief Explanations:

  1. Metamorphic rocks weather to form sediment which can become sedimentary rocks through processes like compaction and cementation. This is correct.
  2. Igneous rocks weather to form sediments, not metamorphic rocks directly. Metamorphic rocks form from pre - existing rocks (igneous, sedimentary or other metamorphic) under high pressure and temperature conditions, not from weathering of igneous rocks. So this is false.
  3. Igneous rocks melt and cool to form other igneous rocks. Metamorphic rocks form from pre - existing rocks due to heat, pressure and chemical changes, not from melting and cooling of igneous rocks. So this is false.
  4. Sedimentary rocks melt and cool to form igneous rocks. When rocks (including sedimentary) melt and then cool, they form igneous rocks through the process of crystallization. This is correct.

Answer:

Metamorphic rocks weather away to form sediment, which can then turn into sedimentary rocks. Sedimentary rocks melt and then cool to form igneous rocks.