Diphthongs

Question 1

/əʊ/ the goat vowel

Answer 1

central position between close-mid and open-mid → a position needed for the pronunciation of /ʊ/. Lips begin in a neutral position after which they become gradually more rounded and the mouth closes slightly.

Question 2

/aʊ/ the mouth vowel

Answer 2

mouth wide open at first after which it closes gradually and the lips become more rounded

Question 3

/eɪ/ the face vowel

Answer 3

/eɪ/ is a glide from a front position between close-mid and open-mid, as for /e/, towards a more retracted and closer position, as for /ɪ/
the lips are spread all the time

Question 4

/aɪ/ the price vowel

Answer 4

/aɪ/ is a glide from te open front vowel /a/ towards a close-mid postion such as that needed for the pronunciation of /ɪ/

Question 5

/ɔɪ/ the choice vowel

Answer 5

open-mid rounded back vowel → close-mid unrounded front vowel

Question 6

/ɪə/ the near vowel

Answer 6

close-mid front vowel → central open-mid vowel

both unrounded

Question 6

/eə/ the square vowel

Answer 6

a front almost open-mid vowel → central open-mid vowel

both unrounded

Question 7

/ʊə/ the cure vowel

Answer 7

close-mid rounded back vowel → central open-mid unrounded vowel
least frequent vowel sound in english