Question:
What is Upper Egypt and Lower Egypt, and the difference between them?
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Answer:
Upper Egypt it is the south of Egypt below Cairo
Lower Egypt it is the north part of Egypt from Cairo and above....

you can use Explore Egypt Project in my website to see the map of Egypt:
http://ILikeEgypt.com/explore.php

Upper Egypt called Upper because it is higher in elevation than Lower Egypt, more than 100 m higher...

Before the dynasties (before King Menes) Egypt was separated into two lands, Upper Egypt and Lower Egypt, Every country contains its own deities (Gods) and habits and crowns...Menes came and united them into one country, after that he called The Lord of Two Lands, below there is a picture taken from Kom Ombo Temple, showing the both crowns and the both Goddesses , on your right hand you will find Goddess Wadjet Goddess of Lower Egypt wearing Lower Egypt Crown, on your left hand Nekhbet Goddess of Upper Egypt and wearing Upper Egypt Crown:
http://ilikeegypt.com/pictures/Img00101.jpg

Regards