Vowel whose quality does not change over the duration of the vowel is called a monophthong. Monophthongs are sometimes called "pure" or "stable" vowels. A vowel sound that glides from one quality to another is called a diphthong, and a vowel sound that glides successively through three qualities is a triphthong. All languages have monophthongs and many languages have diphthongs, but triphthongs or vowel sounds with even more target qualities are relatively rare cross-linguistically. English has all three types: the vowel sound in "hit" is a monophthong , the vowel sound in "boy" is in most dialects a diphthong , and
Types of chocolate Types of chocolate Chocolate is a range of foods derived from cocoa (cacao), mixed with fat (e.g., cocoa butter) and finely powdered sugar to produce a solid confectionery. There are several types of chocolate, classified according to the proportion of cocoa used in a particular formulation. The use of particular name designations is sometimes subject to international governmental regulation. Some governments assign chocolate solids and ranges of chocolate differently. The cocoa bean products from which chocolate is made are known under different names in different parts of the world. In the American chocolate industry: Different forms and flavors of chocolate