cloth fibers oxygen gas saltwater snowflakes
I gave my students this multiple choice question: At the beginning of a science class, the teacher opened a small sealed jar and placed it on a table. The contents of the jar spread throughout the room during class. Which of the following did the jar most likely contain?

Only one answer is correct among these 4 choices:
- cloth fibers
- oxygen gas
- saltwater
- snowflakes

Could you tell me which one is correct?

oxygen gas