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 trigraph is a phoneme which consists of three letters. However, many people will simply use the term 'digraph' generally to describe both combinations. In digraphs, consonants join together to form a kind of consonant team, which makes a special sound.For instance, p and h combine to form ph, which makes the /f/ sound as in phonemic.hen two or more consonants appear together and you hear each sound that each consonant would normally make, the consonant team is called a consonant blend. For instance, the word blend has two consonant blends: bl, for which you hear the sounds for both b and l, and nd, for which you hear the sounds for both n and d.