What is the movement of tectonic plates caused by?
a) convection currents in earth's mantle.
b) the gravity of the iron-nickel core.
c) the rotation of the earth.
d) the moho discontinuity.

Renewable resources of west and central africa include:

How many time zone are there on earth

Afootpath is to be constructed in a park in the shape of a parallelogram. when a coordinate plane is laid over a map of the park, the vertices of the footpath are (-4,2) (8,2) (11,7) and (-1,7). what is the perimeter of this path