Is popping popcorn a physical or chemical change? How can you tell?

It is a Physical change.

Explanation:

To summarize, making popcorn results in major changes to the physical shape, and the release of water, but there is no major change in chemical composition. It is no secret how to get the most popped corn from your kernels; you need just the right amount of water in the endosperm and a robust pericarp.

Hm I learned these last year but its a physical change.

Explanation:

How I can tell:

Popped popcorn is a liquid when popping. But when the kernel turns inside out that makes it a physical change.

the correct answer would be b) volume versus temperature, because they are also directly proportional.