__________ caused the long curving ridges on the surface of Mercury.
A. Lava flooding in lowland basins.
B. Compression and shrinking of the crust.
C. Convection currents underneath the crust.
D. Vertical motion of magma under the crust.
Answer:B
__________ caused the long curving ridges on the surface of Mercury.
A. Lava flooding in lowland basins. B. Compression and shrinking of the crust. C. Convection currents underneath the crust. D. Vertical motion of magma under the crust.