Volcanoes And Other Igneous Activity

Question 1

Definition of a Igneous

Answer 1

Igneous rock (derived from the Latin word ignis meaning fire) is one of the three main rock types, the others being sedimentary and metamorphic. Igneous rock is formed through the cooling and solidification of magma or lava.

Question 2

Definition of lava

Answer 2

hot molten or semi-fluid rock erupted from a volcano or fissure, or solid rock resulting from cooling of this.

Question 3

Definition of Magma

Answer 3

hot fluid or semi-fluid material below or within the earth’s crust from which lava and other igneous rock is formed on cooling.

Question 4

Definition of a Viscosity

Answer 4

The viscosity of a fluid is a measure of its resistance to gradual deformation by shear stress or tensile stress. For liquids, it corresponds to the informal concept of “thickness”. For example, honey has a much higher viscosity than water.