When sedimentary rock is exposed to heat and pressure, what does it change into?
a. magma
b. igneous rock
c. sedimentary rock
d. metamorphic rock

select the best answer from the choices provided

a
b
c
d

Which of the following best describes internal energy? a. the difference between the kinetic and potential energies of the particles in a system b. the sum of the kinetic and potential energies of the particles in a system c. the sum of the kinetic and thermal energies of the particles in a system d. the difference between the kinetic and thermal energies of the particles in a system