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13.11: Lesson Eleven

Created by: CK-12

Words That End in <c> and <ck>

1. Below are some words that end with the sound [k]. Underline the letters that spell the final [k] in each of them. Don’t worry yet about the columns labeled ‘Sounds’:

Word Sounds Word Sounds Word Sounds Word Sounds
poetic 3 wreck 1 specific 3 speck 1
struck 1 athletic 3 elastic 3 enthusiastic 5
scientific 4 quick 1 zodiac 3 check 1
knock 1 sick 1 economic 4 sympathetic 4
traffic 2 seismic 2 schlock 1 patriotic 4

2. Now pronounce each word carefully. Listen for the number of vowel sounds in each word. In the ‘Sounds’ columns write that number. Eight of the words have one vowel sound. Two have two vowel sounds. Five have three vowel sounds. Four have four vowel sounds, and one has five.

3. Now sort the twenty words into this matrix:

Words with the final [k] spelled ...
<c> <ck>
Words with only one vowel sound

struck

knock

wreck

quick

sick

chlock

speck

check

Words with more than one vowel sound

poetic

scientific

traffic

athletic

reissue

specific

elastic

zodiac

economic

enthusiastic

sympathetic

patriotic

4. If a word ends in [k] with a short vowel sound in front of it, the [k] will usually be spelled either <ck> or <c>. If the word has only one vowel sound, the [k] will usually be spelled <ck>. If the word has more than one vowel sound, the [k] will usually be spelled <c>.

5. The following words all contain two vowel sounds but still end in <ck>. Be ready to discuss why they can be analyzed to show that they actually do not contradict the conclusion that in words with only vowel sound final [k] will usually be spelled <ck>:

Word Analysis
horseback horse + back
aftershock after + shock
o’clock o’ + clock
airsick air + sick
thunderstruck thunder + struck
yardstick yard + stick

Teaching Notes.

Item 5. The discussion should point out that each of the long words in the table are compounds that end with a free stem that has one vowel sound and ends <ck>: back, shock, etc.

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Grades:

1 , 2 , 3 , 4 , 5

Date Created:

Feb 23, 2012

Last Modified:

Apr 29, 2014
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CK.ENG.ENG.TE.1.Basic-Speller.13.11

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