BUILDING BLOCKS. Overview. Macromolecules form when smaller molecules (building blocks or subunits) come together. Monomers are joined by covalent bonds to form polymers.
The coldest temperature in the Sahara desert is 36 degrees. Well, it depends on where in the desert, but it can reach below freezing. Its colder nearer to the ocean and warmer towards the center of the desert.
The Sahara Desert, located in North Africa, marks itself as the largest desert in the world by covering more than 3.5 million square miles. Many countries bordering the Sahara experience extreme heat during the summer because of the arid vastness of the Sahara. It can also turn bitterly cold at night. The Sahara Desert is a dry, sandy and arid wasteland. The highest point of the Sahara is Mount Koussi, which is more than 11,000 feet above sea level. At its lowest point, in Egypt, the Sahara is more than 400 feet below sea level.