why do bubbles in carbonated drinks appear out of nowhere and always start at the bottom of a glass?

Question

why do bubbles in carbonated drinks appear out of nowhere and always start at the bottom of a glass?

In: Chemistry

Answer 1

Bubbles need something rough to form around, which is why they tend to form on the edge/bottom of a glass (but can form around impurities in the liquid too).

Also, as you heat up a liquid less gas can be dissolved within it (the opposite of how sugar dissolves well in a hot drink) so bubbles will tend to form where it is warmer.

These 2 combined help to explain why they commonly form at the bottom of the glass.