SUBMERSION MEANS To plunge briefly in or into a liquid: dip, douse, duck, dunk, immerge, immerse, souse, (submerge). To go beneath the surface or to the bottom of a liquid: founder1, sink, submerge. See rise/fall. IMMERSION MEANS To cover completely in a liquid; submerge. To baptize by submerging in water. To engage wholly or deeply; absorb:(eg) scholars who immerse themselves in their subjects. SEEING THE TWO INSTANCES YOU CAN CONCLUDE THAT BOTH THE WORDS MEAN ONE AND THE SAME

They mean something completely different when in reference to cultural subjects such as language.

1) "Using the Communicative Orientation of Language Teaching observation scheme (Spada, N., & Frohlich, M., 1995), the second-language learning environments of elementary-level students of French in four submersion & four immersion classrooms in the Montreal area are compared. The database is composed of almost 60 hours of observations during language arts lessons - 28.4 hours in the four submersion classrooms, so named because they are designed for native speakers of French but comprise a large number of minority-language students obliged to attend French-language schools, & 30.5 hours in the four French immersion classrooms, composed of a majority of Anglophone students attending English-language schools. Results indicate clear differences between the two environments. Language arts lessons in the four submersion classrooms are predominantly analytic; the content focus is primarily on language form & most materials entail only minimal discourse. Conversely, language arts lessons in the four immersion classrooms involve a more balanced combination of analytic & experiential orientations, including more variety in classroom organization, content that focuses on both language & other topics, & text that includes more extended discourse." Source and further information: http://digitool.library.mcgill.ca/R/?func=dbin-jump-full&object_id=19382&local_base=GEN01-MCG02 Further information: http://en.wikipedia.org/wiki/Language_immersion 2) "In mathematics, a submersion is a differentiable map between differentiable manifolds whose differential is everywhere surjective. This is a basic concept in differential topology. The notion of a submersion is dual to the notion of an immersion." http://en.wikipedia.org/wiki/Submersion_(mathematics%29 "In mathematics, an immersion is a differentiable map between differentiable manifolds whose derivative is everywhere injective." http://en.wikipedia.org/wiki/Immersion_(mathematics%29 3) " In the most usual form of early Christian baptism, the candidate stood in water and water was poured over the upper body. In other words, it was immersion, not submersion." Source and further information: http://en.wikipedia.org/wiki/Early_Christianity Further information: http://en.wikipedia.org/wiki/Baptism http://dlibrary.acu.edu.au/research/theology/ejournal/aet_1/Ferguson.htm

Depends upon what the motive force of the object in question. If it is doing so itself- it is submerging itself. If it is done by an outside motivator, it is getting immersed.

Submersion is torture. Immersion is bathing.