Describe the location and extent of the Sahara Desert.

Look at the map of the Sahara desert and the adjoining areas provided below and answer the following questions:

1. Name the mountain range located in the north-western part of the Sahara desert.

2. Name the river which flows through the eastern part of the Sahara desert.

3. Which important latitude passes through the Sahara desert?

4. Name the deserts which are also part of the Sahara desert.