From the following which is not an ore
a. bauxite
b. haematite
c. calamine
d. cyolite

Subduction zones occur on earth where dense oceanic crust dives under more buoyant continental crust. these boundaries are characterized by a deep ocean trench next to a high continental mountain range, large numbers of earthquakes and volcanoes. all of this is further evidence for the a) big bang theory b) origin of the species eliminate c theory of plate tectonics d theory of natural selection 4 sedimentary rocks found high in the himalayen mountain

Which metal exist in liquid state and can be cut with knife ?

In 2002, the rare earth elements mine in mountain pass, california was closed because