Exodus 18, Jethro’s advice.
Jethro was descendant of Keturah, which Abraham married after Sarah’s death. She bore him Midian, and Jethro was a descendant of Midian. Midian extended mostly east of the Gulf of Aqaba, but also included the southeast Sinai peninsula.
God appoints His spiritual servants, the people, not the apostles choose their civil servants. This is God’s will.
Exodus 17, water from the Rock, the Amalekites defeated.
Exodus 16, Manna and Quail from heaven.
The desert (or wilderness) of Sin, the lower part of the Sinai Peninsula. Note there is a wilderness of Zin southwest of the Dead Sea.
An Omer is a dry measure, about 2.4 liters, or about 150 cubic inches.
Exodus 15,the Song of Moses and Miriam, the bitter water of Marah, the oasis of Elam.
There are two possible routes, the traditional route with Marah and Elim on the right side of the Gulf of Suez. The Manna was not yet given, the Israelis still had their provisions from Egypt, so Marah must have been only a few days journey from the Red Sea crossing.
The alternate route, favored by Muslims is to place the Red Sea crossing at the mouth of the Gulf of Aqaba, placing Mt Sinai in the Levant rather than the Sinai Peninsula. This would have posed major logistical problems for the Israelis, going all the way from Egypt to the Gulf of Aqaba with food from Egypt.
Exodus 13 
The route the Israelis took has always been contested. Here is one proposed route according to the latest observations (from 2008 A.D.) The wilderness of Etham begins at the edge of the desert east of Succoth.
Exodus 12
Exodus 11 
Exodus 9
Yes, Egypt can even have snow!
Exodus 8
Len Bilén's blog, a blog about faith, politics and the environment. 