I would have to say its a very hot place to be. but being surrounded by desserts benefited in Egypt in fact that no one could attack or conquer them there. No group could ever cross the Sahara to get to Egypt for they would die half way in. over 40,000 sq kms (15000 sq miles) flowed through Egypt.
Cinder cones are the simplest type of volcano. They are built from particles and blobs of congealed lava ejected from a single vent. As the gas-charged lava is blown violently into the air, it breaks into small fragments that solidify and fall as cinders around the vent to form a circular or oval cone.
Conquistadors are Spanish soldiers
Aztec were people who were a group like the Natives but called something different