Earth's interior is a. equally dense throughout. b. not subject to internal differentiation. c. heated unevenly by the heat of radioactive decay. d. arranged with lighter elements toward the center and heavier elements toward the crust.

Religious conflict in northern ireland started with a) cultural differences resulting from viking invasions around 800 b) england’s split from the catholic church in the 1500s c) rebellions in ireland between 1916 and 1921 d) the norman invasion of england in 1066