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Cambridge Secondary (7-9). Stage 8. Science. Learner's Book - Unit 3: Forces and energy - Question 128

Cambridge Secondary (7-9) · Unit 3: Forces and energy

Question 128

Zara’s mother opens a bottle of perfume. Zara is at the other side of the room. After a few minutes, Zara can smell the perfume. Which of these explains why Zara smells the perfume? Write one letter.
  1. All the gas particles of the perfume move in one direction.
  2. All the gas particles of the perfume move randomly.
  3. All the particles in the air move in one direction.
  4. All the particles in the air are stationary (not moving).
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