Which of the following statements is true? Granite is formed when rock pieces are cemented together by dissolved chemicals. The crust below continents is thinner than crust below oceans. Marble is a type of igneous rock. Aristotle used Earth's shadow during a lunar eclipse to prove the world was not flat.

Aristotle used Earth's shadow during a lunar eclipse to prove the world was not flat.

Explanation:

A is FALSE. Granite forms from the slow crystallization of magma below Earth's surface.

B is FALSE. The thickness of the continental crust that can reach more than 70 km.

C is FALSE. Marble is a metamorphic rock. It forms when limestone is subjected to heat and pressure.

D is TRUE. Aristotle reasoned that the Earth's shadow on the moon was round, so the Earth must also be round.

"among the transition metal elements, manganese and zinc have a slight lowering of electronegativities. the reason behind this is that the nuclear charges of these elements are slightly weaker than the other transition metal elements due to the way their valence electrons are filled up. both manganese and zinc have their valence electrons filled up to the 4th shell with 1 pair of electrons (4s2) completely occupying it. although the electrons in the 3rd shell (3d) are yet to be paired since the outer most shell is filled up, the ability of the nucleus to attract electrons is lessened. hence,   the electronegativity (or the ability to attract electrons) is lessened."