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Super smart! We said that matter is made up of particles. So, if there are no particles in some region, there cannot be any matter there. That region is just empty space.
You take a water bottle and suck all air out of it. So, the bottle has no particles inside, not even air. You then make a small hole at the bottom of the bottle and let some smoke inside.
The smoke spreads everywhere in the bottle. Which of the following is correct?
  • The smoke particles moved up
  • Smoke particles got created at the top
  • The particles at the top got converted to smoke
  • None of these