What do most igneous, sedimentary and
metamorphic rocks have in common?
(1) They are formed from molten material.
(2) They are produced by heat and pressure.
(3) They are composed mostly of minerals.
(4) They are found mostly in distinct layers.

the second significant cause of the great migration was the desire of black southerners to escape segregation, known euphemistically as jim crow. rural african american southerners believed that segregation - and racism and prejudice against blacks - was significantly less intense in the north.

richard milhous nixon (january 9, 1913 – april 22, 1994) was the 37th president of the united states, serving from 1969 to 1974, when he became the only president to resign (quit). he is also known for corruption and the watergate scandal which resulted in the public losing trust in him and his resignation.