One plate tectonic process that causes very widespread ...

[xclash]

One plate tectonic process that causes very widespread metamorphism is ___________________ _. Fill in the blank(s) with the appropriate word(s).

Question 2

If a rock is exposed to such high temperatures that it melts, it forms a(n) ___________________ _ and
  becomes a(n) ___________________ _ rock. Fill in the blank(s) with the appropriate word(s).

[Athena23]

Answer to Question 1

subduction

Answer to Question 2

magma, igneous

[xclash]

Thanks for the timely response, appreciate it

[Bigfoot1984]

Gracias!