The Mohorovicic discontinuity is the boundary between
a. the lithosphere and the asthenosphere.
b. the crust and the mantle.
c. the outer core and the inner core.
d. the mantle and the outer core.
Question 2
The ______________ for compounds are written by putting the composing elements' symbols adjacent to each other, with subscripts indicating the number of atoms of each.
a. equations
b. molecules
c. isotopes
d. formulas