Exercise 4.1
Can you locate the River Nile on the given map? Why do you think the northern part is called Lower Egypt and the southern part Upper Egypt?
The book prints no answer for this
NCERT publishes no answers for this textbook, so there is nothing in the book to check this working against. It has also not yet been read through by hand.
Locating the River Nile on Fig. $\displaystyle 4.30$
Trace the long waterway that enters the map at the southern (bottom) edge near Hermopolis and runs northwards up the middle of the map to the Mediterranean Sea along the top.
It threads past the places marked beside it — Hermopolis in the far south, then Sakkara, Memphis and Turah, and Heliopolis and Giza close to the sea.
Do not mistake the Gulf of Suez, on the eastern side of the map, for the river; that is an arm of the sea, not the Nile.
Shade the narrow strip of land along both banks. This is the land the chapter says the Nile watered, and that the summer flood covered each year with rich mud, kemet, excellent for growing crops.
Why the northern part is called Lower Egypt and the southern part Upper Egypt
On Fig. $\displaystyle 4.30$ only one of the two names is printed — Lower Egypt, in the north, near the Mediterranean. This map covers only about $\displaystyle 28$°N to $\displaystyle 31$°N, so Upper Egypt lies off its southern edge and no Upper Egypt label appears on it.
The map that carries both names is Fig. $\displaystyle 4.21$, the Fertile Crescent map, where UPPER EGYPT is printed to the south of LOWER EGYPT.
The likely reason for the names — this is reasoning, not something the chapter states — is that they follow the river, not the compass. The Nile runs from the south up to the Mediterranean in the north, so the northern end is downstream, the 'lower' end, and the southern end is upstream, the 'upper' end.
The names were given by people who lived along the river, and for them 'up' and 'down' meant up-river and down-river, not up and down a printed page.
What a good map answer must contain
The Nile traced from the bottom of the map to the Mediterranean Sea, and labelled.
Lower Egypt marked in the north, at the place Fig. $\displaystyle 4.30$ itself prints it.
If you also want to show Upper Egypt, mark it to the south — beyond the area this map covers — and take its position from Fig. 4.21.
One sentence of reasoning for the two names, clearly marked as your own reasoning.