The question asks for the best definition of 'geomorphic processes'. Geomorphic processes are fundamental to understanding how Earth's surface features are formed and changed. We need to identify the option that comprehensively covers all forces involved.
B) All exogenic and endogenic forces that alter the surface of the earth
This option correctly encompasses both the internal (endogenic) forces like volcanism, earthquakes, and plate tectonics, and the external (exogenic) forces like weathering, erosion, and deposition by agents such as water, wind, and ice. These combined forces are responsible for creating, modifying, and destroying landforms on Earth's surface.
The question asks about the primary source of energy for endogenic forces. Endogenic forces are geological processes originating from within the Earth. We need to identify which of the given options represents an internal energy source for these processes.
A) Earth's interior heat (radioactive decay and primordial heat) — This is the primary energy source for endogenic forces. The heat from radioactive decay and residual heat from the Earth's formation drives convection currents in the mantle, leading to plate tectonics, volcanism, and seismic activity.
The question asks about the primary driving forces behind exogenic geomorphic processes. Exogenic processes are those that occur on or near the Earth's surface and are responsible for shaping the landscape through weathering, erosion, transportation, and deposition. We need to identify the energy sources that power these external processes.
Correct Option: C) Energy from the sun and gravity
The question asks to identify the combination that correctly represents exogenic processes. Exogenic processes are geological processes that occur on or near the Earth's surface and are driven by external forces, primarily solar energy and gravity. These processes are responsible for shaping the Earth's landscape by wearing down and building up landforms.
Correct Option: C) Weathering, erosion, deposition — These are all processes that occur on the Earth's surface, driven by external forces, and are responsible for the degradation and accumulation of landforms.
The question asks to identify the processes included under diastrophism. Diastrophism refers to large-scale deformation of the Earth's crust by tectonic forces, leading to the formation of continents, ocean basins, mountains, etc. It involves processes that cause vertical and horizontal movement of the crust.
B) Folding, faulting, uplift and subsidence — These are all fundamental processes that involve the deformation and movement of the Earth's crust on a large scale, directly contributing to the formation of major geological structures. They are driven by internal forces of the Earth and are characteristic of diastrophic movements.
The question asks for the most accurate definition of 'weathering'. We need to understand the core concept of weathering and differentiate it from related geological processes like erosion, transportation, and deposition.
C) Mechanical disintegration and chemical decomposition of rocks in situ. This statement accurately defines weathering as the breakdown of rocks by physical (mechanical) and chemical processes while the rock material remains in its original location.