understanding partitioning

[Linux Tyro]

Hi,

I really have installed Ubuntu LTS and everything is working fine here on my
PC. Just as a matter of interest, I have the following to be asked (very
frankly), at first declaring that I really don't know anything regarding it.

About how really partitioning works, in fact what exactly it is! Just
installed the Ubuntu LTS on my machine (now the system is dual booted with
Ubuntu LTS & Windows XP). Please *if *someone has some time (definitely
people would have it, somehow, somewhere, could elaborate me (in details))
in simple language about all that or give me the link where in very simple
language I could understand all those fuzzy things (which home users need
not look). These include:

- What are these partitions sda1, 2, 3, ....how to know if ubuntu is sda1 or
sda2 or what and is it different from /home....?
- When I installed ubuntu 10.04 LTS, it got installed and that partition is
sda1/2/3/4/5 ...and upto where does this go...?
-LVM yet another thing, is related with what...? It is (also) a partition or
what....? It is sda...?
- Mounting a partition means what, what exactly we are going to do with that
partition after mounting it and before mounting, was it in existence?

Thx.
-- 
Two atoms are walking along. Suddenly, one stops. The other says, "What's
wrong?" "I've lost an electron." "Are you sure?" "I'm positive!"

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Ubuntu LTS is good <http://sites.google.com/site/whyilikeubuntu/>!
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