Email vs. Text What is the difference?

My family often confuse the two as being the same task.  The simplest, least confusing way that I can define the two is as follows:  eMail is done via the internet (can be thought of as sending digital mail  or your mailbox on the internet)  texting is done from a mobile device through the use of satellites. Please add any input you may have for this topic.  Thanks for reading