Which of these would best explain a piece of metamorphic rock that was formed from a 5000 kg igneous rock under extreme heat and pressure

Daughter element the new element produced along with a decay particle in a nuclear transmutation 2. half-life the substance that decays in a nuclear transmutation 3. parent element the change of one chemical element into another by nuclear decay or radioactive bombardment 4. transmutation the time required for the decay of one-half of the atoms in a sample of radioactive material

Why does gravity have a lesser than grater effect on higher altitudes?

What is the difference between mass density and weight density?