What is diffusion?

A Movement of particles from low to high concentration

B Movement of particles from high to low concentration

C Active transport requiring energy

D Cell division

✓ Correct Answer: Option B

Diffusion is the passive movement of particles from areas of high concentration to low concentration.

💡 Why is B) the correct answer?

The correct answer to the question "What is diffusion?" is Option B: Movement of particles from high to low concentration.

The other options — A) Movement of particles from low to high concentration, C) Active transport requiring energy, D) Cell division — are incorrect for this ACT Exam Prep question. As explained above: Diffusion is the passive movement of particles from areas of high concentration to low concentration.

📚 About This ACT Exam Prep Practice Question

This 1-level ACT Exam Prep question from the Science topic is part of BrainForge Quiz's free exam preparation library. Each question includes the correct answer and a detailed explanation to help you understand the underlying concept, not just memorize the answer.

How to use this page: Read the question above, consider all four options (A through D), then check the highlighted correct answer and explanation. For active timed practice, start a free ACT Exam Prep practice test or use flashcards for spaced repetition review.

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What is diffusion?

✓ Correct Answer: Option B

📚 About This ACT Exam Prep Practice Question

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