The variety of shielding gases used in arc welding can be a confusing topic. However, the use of an external shielding gas is a necessary component for some processes, as it is a requirement for surrounding and protecting the arc and molten weld metal from contamination by the atmosphere.
Consonant Digraphs. Second Grade. Spelling/Phonics. Consonant Digraphs Consonant digraphs are two (or three) letters that come together to make one sound. The difference between blends and digraphs is that blends are two letters that make two sounds and digraphs make one sound.onsonant Digraphs. Second Grade. Spelling/Phonics. Consonant Digraphs Consonant digraphs are two (or three) letters that come together to make one sound. The difference between blends and digraphs is that blends are two letters that make two sounds and digraphs make one sound.
A consonant digraph consists of two adjacent consonants that produce one sound. The digraphs sh, ch, and th represent unique sounds that are not usually associated with any individual letters of the alphabet. The digraphs kn and gn are associated with the sound of /n/, and the digraph ph is associated with the sound of /f/. Learning to recognize the consonant digraphs is very helpful to beginning readers and writers because many early reading words contain these special two letter combinations.