The goal of Unit 11 of The Physics Classroom Tutorial is to develop an understanding of the nature, properties, behavior, and mathematics of sound and to apply this understanding to the analysis of music and musical instruments.
It's as big as the continental United States, but covered in sand. If you like to dig your feet in the sand, then the Sahara Desert is the place for you. Watch out though - it's hot! Temperatures range from 122 F to below freezing in the winter. Sand dunes can reach over 189 meters tall or be flat for miles and miles.
The Sahara has one of the world's most severe climates. Typically, the Sahara landscape experiences extremely limited to virtually no rainfall, powerful and capricious winds and wide temperature ranges. Across the desert, the annual average rainfall equals no more than a few inches or less, much less in many locations.