Rock can be changed directly into rock with the application of heat and pressure. a. sedimentary, metamorphic b. sedimentary, igneous c. metamorphic, sedimentary d. igneous, sedimentary

Answer – A (Sedimentary; Metamorphic)

When sufficient heat and pressure is applied, sedimentary rock can be transformed directly into metamorphic rock. As a matter of fact, metamorphic rocks were at a time sedimentary rocks (or sometimes igneous rocks) that have been changed by heat and pressure.

The proton has a positive charge while the neutron has no charge they both make up the nucleus of the atom while the elections have a negative charge and surround the nucleus of the atom. the protons and electrons are used to calculate the atom's mass whereas the neutrons don't affect the mass