Here's why:
* Short vowel sounds are typically quick and sharp, often sounding like the letter itself. In "bath," the "a" sound is similar to the "a" in "cat" or "hat."
* Long vowel sounds are typically drawn out and can be represented by different spellings (like "a" in "cake" or "ai" in "rain").
Let me know if you have any other words you'd like to check the vowel sounds for!