Which of the following is the transition zone between the hydrosphere and crust?
a) Guttenberg’s discontinuity
b) concord discontinuity
c) both a & b
d) none of these
What is the transition between the crust and the mantle?
a) Mohorovicic discontinuity
b) Guttenberg’s discontinuity
c) Repetto discontinuity
d) none of these
What is the transition zone between upper mantle and lower mantle?
a) Repetto discontinuity
b) Guttenberg’s discontinuity
c) both a & b
d) none of these
Who invented the Guttenberg’s discontinuity?
a) coulomb
b) newton
c) Weichert Gutenberg’s
d) none of these
Plate Tectonic Theory (حرکاتی پلیٹس کا نظریہ):
Earth did not have seven continents before?
a) 230 million years ago
b) 240 million years ago
c) 250 million years ago
d) 260 million years ago
