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 Desert hosts an incredible array of species that are well-adapted to survive in the desert climate. 70 mammalian species, 90 avian species, 100 species of reptiles, and several species of spiders, scorpions, and other smaller forms of life, call the Sahara Desert their home.