Here's why:
* Short vowel sounds are typically quick and sharp. They are often found in closed syllables (syllables that end with a consonant).
* Long vowel sounds are typically drawn out and have a more open sound. They are often found in open syllables (syllables that end with a vowel).
In the word "nose," the vowel "o" is in a closed syllable because it is followed by the consonant "se." This makes it a short o sound, like the vowel sound in words like "hot," "lot," or "box."