The most common shielding gases used for these main arc welding processes include argon (Ar), helium (He), carbon dioxide (CO2) and oxygen (O2). While Ar, He and CO2 may be used by themselves (i.e. 100%) for certain applications, in other cases the four gases are mixed together in different combinations to form shielding gas blends.
Cluster reduction in speech is when a consonant cluster, that is two or three consonants occurring in sequence in a word (like ândâ in friend), is reduced by a child into a single consonant through omission.
Contact Us. These activities help with initial and end clusters in words (eg spin, desk). This area of phonic knowledge is introduced in the Year 1 Term 2 objectives of the National Literacy Strategy Framework. Choose a start sound and an end sound and let Wordblender 'bl-bl-blend' them together to make a new word. A fun game to help practise those clusters.