(A) metamorphic
(B) igneous
(C) sedimentary
(D) inorganic
Author:
The capacity of rock to allow water to pass through it is called:
(A) hardness
(B) jointing
(C) porosity
(D) permeability
The number of economic minerals associated with sedimentary rocks is:
(A) more than that associated with igneous rocks
(B) less than that associated with igneous rocks
(C) same as that in igneous rocks
(D) unknown
Magma that reaches earth’s surface and then solidifies is called:
(A) granite
(B) lava
(C) quartz
(D) silicates
There are two types of crusts – the continental and the oceanic. The continental crust is:
(A) thicker below the plains than below mountains
(B) thicker below the mountains than below the plains
(C) almost same all over
(D) thicker under the oceans than under the seas
The temperature at the core of the earth is about:
(A) 20000º C
(B) 2000º C
(C) 200000º C
(D) 26000º C
The longitudinal, transverse and surface waves in an earthquake originate from:
(A) the focus within the body of the earth
(B) the epicentre on the surface of the earth
(C) the focus on the surface of the earth
(D) the epicentre within the body of the earth
The layers of the earth’s crust are distinguished by their:
(A) thickness and depth
(B) density and temperature
(C) metallic content and rocks
(D) All the above