In an experiment, smoke particles are held in air and observed using a microscope. The smoke particles make short, random movements. Which of the following statements is correct?
- AAir particles have large masses compared to smoke particles and they move in one direction only.
- BAir particles have large masses compared to smoke particles and they move in random directions.
- CAir particles move at high speeds compared to smoke particles and they move in one direction only.
- DAir particles move at high speeds compared to smoke particles and they move in random directions.