What is common between liquids and gases. Gases are similar to liquids in that they flow; hence, both are called fluids. The primary different between gases and liquids is the distance between molecules. In liquids, the molecules are close together, where they c ontinually experience forces from surrounding molecules.
Injera is usually made from the tiny, iron-rich teff. However, teff production is limited to certain middle elevations and regions with adequate rainfall, so it is relatively expensive for the average household.
Regional variants. The dulce de leche of El Salvador has a soft, crumbly texture, with an almost crystallized form. Central Mexico had versions as manjar (vanilla flavored) or cajeta, which is made from goat's milk, in the North of the country the dulce de leche from cow's milk is more common.