Here's why:
* Short vowel sounds are typically quick and sharp. They are often represented by a single vowel letter in a word (like "u" in "juice").
* Long vowel sounds are typically drawn out and are often represented by a vowel followed by a silent "e" (like "juice" if it were pronounced "joo-see").
The "u" in "juice" is a short vowel sound, similar to the "u" in words like "cup", "duck", and "fun".