Question

lesson 1.20 vowel diphthongs (oi, oy)
a diphthong (pronounced dip thong) is a combination of two vowel sounds that come together and create a new sound.

• the diphthong oi, as in spoil, and oy, as in joy, make the same sound.

underline the words in each set that have the same vowel sound.

1. avoid frog destroy belong
2. stomp globe appoint royal
3. coast spoil voyage plot
4. moist floyd those joint
5. below toilet employ potluck
6. pinpoint throne foil annoy

complete each sentence below with a word from the box. then, circle the diphthong in the word.
spoiled corduroy oysters foil oink cowboy

1. _______________ is the sound a pig makes.
2. clothes can be made out of a soft type of material called _______________.
3. _______________ are a type of shellfish that are often served at seafood restaurants.
4. a _______________ is a person who cares for cattle on a ranch.
5. something that is rotten is _______________.
6. a shiny silver material used for covering food is called

Explanation:

Part 1: Underline the words with the same vowel sound (oi/oy)

1. Step 1: Identify the vowel sound (oi/oy) in each word.

• avoid: has "oi" sound (avoid)
• frog: no "oi/oy" sound
• destroy: has "oy" sound (destroy)
• belong: no "oi/oy" sound
• So, underline "avoid" and "destroy".

1. Step 1: Identify the vowel sound (oi/oy) in each word.

• stomp: no "oi/oy" sound
• globe: no "oi/oy" sound
• appoint: has "oi" sound (appoint)
• royal: has "oy" sound (royal)
• So, underline "appoint" and "royal".

1. Step 1: Identify the vowel sound (oi/oy) in each word.

• coast: no "oi/oy" sound
• spoil: has "oi" sound (spoil)
• voyage: has "oy" sound (voyage - "oy" sound)
• plot: no "oi/oy" sound
• So, underline "spoil" and "voyage".

1. Step 1: Identify the vowel sound (oi/oy) in each word.

• moist: no "oi/oy" sound
• Floyd: has "oy" sound (Floyd)
• those: no "oi/oy" sound
• joint: has "oi" sound (joint)
• So, underline "Floyd" and "joint".

1. Step 1: Identify the vowel sound (oi/oy) in each word.

• below: no "oi/oy" sound
• toilet: has "oi" sound (tooilet)
• employ: has "oy" sound (employ)
• potluck: no "oi/oy" sound
• So, underline "toilet" and "employ".

1. Step 1: Identify the vowel sound (oi/oy) in each word.

• pinpoint: has "oi" sound (pinpoint)
• throne: no "oi/oy" sound
• foil: has "oi" sound (foil)
• annoy: has "oy" sound (annoy)
• So, underline "pinpoint", "foil", and "annoy".

Part 2: Complete the sentences

1. Step 1: Recall the sound a pig makes.

• A pig makes the sound "oink". So, the word is "oink". (Circle "oi" in "oink")

1. Step 1: Recall the soft material for clothes.

• Corduroy is a soft material for clothes. So, the word is "corduroy". (Circle "oi" in "corduroy")

1. Step 1: Recall the shellfish served at seafood restaurants.

• Oysters are a type of shellfish. So, the word is "oysters". (Circle "oy" in "oysters")

1. Step 1: Recall the person who cares for cattle on a ranch.

• A cowboy cares for cattle on a ranch. So, the word is "cowboy". (Circle "oy" in "cowboy")

1. Step 1: Recall the word for something rotten.

• Something rotten is "spoiled". So, the word is "spoiled". (Circle "oi" in "spoiled")

1. Step 1: Recall the shiny silver material for covering food.

• Foil is a shiny silver material for covering food. So, the word is "foil". (Circle "oi" in "foil")

Final Answers (Part 1 Underlined Words)

1. avoid, destroy
2. appoint, royal
3. spoil, voyage
4. Floyd, joint
5. toilet, employ
6. pinpoint, foil, annoy

Final Answers (Part 2 Completed Sentences)

1. oink (Circle "oi")
2. corduroy (Circle "oi")
3. oysters (Circle "oy")
4. cowboy (Circle "oy")
5. spoiled (Circle "oi")
6. foil (Circle "oi")

Answer:

Part 1: Underline the words with the same vowel sound (oi/oy)

1. Step 1: Identify the vowel sound (oi/oy) in each word.

• avoid: has "oi" sound (avoid)
• frog: no "oi/oy" sound
• destroy: has "oy" sound (destroy)
• belong: no "oi/oy" sound
• So, underline "avoid" and "destroy".

1. Step 1: Identify the vowel sound (oi/oy) in each word.

• stomp: no "oi/oy" sound
• globe: no "oi/oy" sound
• appoint: has "oi" sound (appoint)
• royal: has "oy" sound (royal)
• So, underline "appoint" and "royal".

1. Step 1: Identify the vowel sound (oi/oy) in each word.

• coast: no "oi/oy" sound
• spoil: has "oi" sound (spoil)
• voyage: has "oy" sound (voyage - "oy" sound)
• plot: no "oi/oy" sound
• So, underline "spoil" and "voyage".

1. Step 1: Identify the vowel sound (oi/oy) in each word.

• moist: no "oi/oy" sound
• Floyd: has "oy" sound (Floyd)
• those: no "oi/oy" sound
• joint: has "oi" sound (joint)
• So, underline "Floyd" and "joint".

1. Step 1: Identify the vowel sound (oi/oy) in each word.

• below: no "oi/oy" sound
• toilet: has "oi" sound (tooilet)
• employ: has "oy" sound (employ)
• potluck: no "oi/oy" sound
• So, underline "toilet" and "employ".

1. Step 1: Identify the vowel sound (oi/oy) in each word.

• pinpoint: has "oi" sound (pinpoint)
• throne: no "oi/oy" sound
• foil: has "oi" sound (foil)
• annoy: has "oy" sound (annoy)
• So, underline "pinpoint", "foil", and "annoy".

Part 2: Complete the sentences

1. Step 1: Recall the sound a pig makes.

• A pig makes the sound "oink". So, the word is "oink". (Circle "oi" in "oink")

1. Step 1: Recall the soft material for clothes.

• Corduroy is a soft material for clothes. So, the word is "corduroy". (Circle "oi" in "corduroy")

1. Step 1: Recall the shellfish served at seafood restaurants.

• Oysters are a type of shellfish. So, the word is "oysters". (Circle "oy" in "oysters")

1. Step 1: Recall the person who cares for cattle on a ranch.

• A cowboy cares for cattle on a ranch. So, the word is "cowboy". (Circle "oy" in "cowboy")

1. Step 1: Recall the word for something rotten.

• Something rotten is "spoiled". So, the word is "spoiled". (Circle "oi" in "spoiled")

1. Step 1: Recall the shiny silver material for covering food.

• Foil is a shiny silver material for covering food. So, the word is "foil". (Circle "oi" in "foil")

Final Answers (Part 1 Underlined Words)

1. avoid, destroy
2. appoint, royal
3. spoil, voyage
4. Floyd, joint
5. toilet, employ
6. pinpoint, foil, annoy

Final Answers (Part 2 Completed Sentences)

1. oink (Circle "oi")
2. corduroy (Circle "oi")
3. oysters (Circle "oy")
4. cowboy (Circle "oy")
5. spoiled (Circle "oi")
6. foil (Circle "oi")