Define internal and external process
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Internal and external processes of the earth are responsible for the continuous physical changes that are taking place on the Earth’s surface from time immemorial. The forces which produce physical features are
Basic Differences between Internal and external processes. The internal process leads to the up-liftment and sinking of the earth’s surface, whereas the external process is the continuous wearing down and rebuilding of the land surface.
External process occur on the surface of the earth .It is slow change .Ex- change in level of the earth .Internal process occur inside the surface of the earth .It is sudden change .Ex -earthquake activitiesA. Internal (operate within the Earth’s crust)
I. Earth Movements
(i) Vertical (up and down) movements cause faulting of the crustal rocks.
Features produced : Plateaus; block mountains (horsts); basins; some types of escarpment.
(ii) Lateral (sideways) movements cause folding of the crustal rocks.
Features produced - fold mountains; rift valleys; horsts; block mountains
II. Volcanic Eruptions
(i) External (lavas reach the Earth’s surface)
Features produced : lava plains and plateaus; volcanic cones; geysers
(ii) Internal (lavas solidify in the crust)
Features produced : dykes; sills etc.
B. External (operate on the Earth’s surface)
I.Denudation
(i) Weathering (the break-up of rocks by alternate heating and cooling; chemical actions, and the action of living organisms).
Features produced : soil; earth pillars (by rain action)
(ii) Erosion (the break-up of rocks by the action of rock particles being moved over the Earth’s surface by water, wind and ice).
Features produced : valleys; cliffs, river and coastal terraces; escarpments (in) Transport (the movement of rock particles over the Earth s surface by water, wind and ice)
II.Deposition
(i) By water (river or sea)
Features produced : flood plains; levees; alluvial fans; deltas; beaches; lake plains; marine alluvial plains
(ii) By Ice (ice sheets and valley glaciers)
Features produced : boulder clay plains; out-wash plains; moraines; drumlins; eskers
(iii) By Wind
Features produced : loess plains; sand dunes
(iv) By living organisms (e.g. coral) features produced : coral formations
(v) By Evaporation and Precipitation -Features produced : salt deposits
(vi) Of Organic Matter- Features produced : coal deposits
Hope this helps you!!!
Internal and external processes of the earth are responsible for the continuous physical changes that are taking place on the Earth’s surface from time immemorial. The forces which produce physical features are
Basic Differences between Internal and external processes. The internal process leads to the up-liftment and sinking of the earth’s surface, whereas the external process is the continuous wearing down and rebuilding of the land surface.
External process occur on the surface of the earth .It is slow change .Ex- change in level of the earth .Internal process occur inside the surface of the earth .It is sudden change .Ex -earthquake activitiesA. Internal (operate within the Earth’s crust)
I. Earth Movements
(i) Vertical (up and down) movements cause faulting of the crustal rocks.
Features produced : Plateaus; block mountains (horsts); basins; some types of escarpment.
(ii) Lateral (sideways) movements cause folding of the crustal rocks.
Features produced - fold mountains; rift valleys; horsts; block mountains
II. Volcanic Eruptions
(i) External (lavas reach the Earth’s surface)
Features produced : lava plains and plateaus; volcanic cones; geysers
(ii) Internal (lavas solidify in the crust)
Features produced : dykes; sills etc.
B. External (operate on the Earth’s surface)
I.Denudation
(i) Weathering (the break-up of rocks by alternate heating and cooling; chemical actions, and the action of living organisms).
Features produced : soil; earth pillars (by rain action)
(ii) Erosion (the break-up of rocks by the action of rock particles being moved over the Earth’s surface by water, wind and ice).
Features produced : valleys; cliffs, river and coastal terraces; escarpments (in) Transport (the movement of rock particles over the Earth s surface by water, wind and ice)
II.Deposition
(i) By water (river or sea)
Features produced : flood plains; levees; alluvial fans; deltas; beaches; lake plains; marine alluvial plains
(ii) By Ice (ice sheets and valley glaciers)
Features produced : boulder clay plains; out-wash plains; moraines; drumlins; eskers
(iii) By Wind
Features produced : loess plains; sand dunes
(iv) By living organisms (e.g. coral) features produced : coral formations
(v) By Evaporation and Precipitation -Features produced : salt deposits
(vi) Of Organic Matter- Features produced : coal deposits
Hope this helps you!!!
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