substrates
PronouncedSUHB-strayts
nounSurfaces that things grow on or stick to.
nounMaterials that an enzyme or chemical acts on to make something new.
nounLayers underneath something else.
nounMaterials lining the bottom of a container or space.
Phonics breakdown
Phonics Rule: Letter S
Sound“s”·/s/
The letter S usually makes the /s/ sound, like in 'sun', 'sit', and 'sock'. Air hisses through a small gap.
S is a voiceless alveolar fricative when it makes the /s/ sound. At the end of many words it can also make a /z/ sound (as in 'dogs' or 'has'). At the start of a word it is always /s/.
Tip
S hisses like a snake — sssssun!
Examples
When the letter U appears in a closed syllable, it usually makes the short U sound “uh”. This sounds like 'uh'.
Tip
U says “uh” like 'uh-oh, what's up?'
Examples
Phonics Rule: Letter B
Sound“b”·/b/
The letter B makes the /b/ sound, like in 'bat', 'big', and 'bug'. Both lips press together then release.
B is a voiced bilabial stop — both lips press together and release with voice. It always makes the /b/ sound except when silent at the end of words after m (as in 'lamb' or 'comb').
Tip
B looks like a bat — and bat starts with /b/!
Examples
Phonics Rule: STR Blend
Sound“str”·/str/
S, T, and R blend together — you hear all three! Like in 'strong' and 'street'.
STR is a three-letter consonant blend. You hear /s/, /t/, and /r/ spoken quickly together. It always appears at the beginning of a word.
Examples
Phonics Rule: Open Syllable A (Long A)
Sound“ay”·/eɪ/
When A is the last letter of a syllable, the syllable is open and the A says its name “ay” — like in 'ba-by' and 'pa-per'.
This is the open-syllable pattern: a syllable that ends in a vowel leaves that vowel 'open', so it says its long name. Here, a lone A at the end of a syllable says “ay” (ba-by, a-pron, lady). The long A sound is also spelled other ways, each its own rule — silent E (cake), or vowel teams (ai in rain, ay in play) — but those are not open syllables.
Tip
Long A says its name — A!
Examples
Phonics Rule: Letter T
Sound“t”·/t/
The letter T makes the /t/ sound, like in 'top', 'tap', and 'ten'. The tongue tip taps behind the upper teeth.
T is a voiceless alveolar stop. The tongue tip touches the ridge behind the upper teeth and releases with a puff of air. Double T (tt) makes the same /t/ sound.
Tip
T taps — touch your tongue to make /t/!
Examples
Phonics Rule: Plural -S (/s/ sound)
Sound“s”·/s/
After a quiet sound like p, t, k or f, the plural ending says /s/ — like 'cats' and 'cakes'.
Say 'ssss' and then 'zzzz' with a finger on your throat — only 'zzzz' buzzes. When the word already ends in a quiet (unvoiced) sound like p, t, k or f, the plural ending stays quiet too and says /s/. This happens whether the word is spelled -s (cats) or -es (cakes, notes), because in cakes the e is silent and only the s is sounded.
Examples
What is SnapPhonics?
A phonics reference for teachers, parents and learners. Every English word, broken into the sounds that make it — with audio, syllables, and the rule behind each spelling.
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