Diffusion and osmosis

Explain how substances move into and out of cells by diffusion and osmosis and predict the direction of movement.

⏱ 20 min❓ 9 questions

What you'll be able to do

✔I can explain diffusion as the net movement of particles from high to low concentration
✔I can explain osmosis as the movement of water across a partially permeable membrane
✔I can predict what happens to plant and animal cells placed in solutions of different concentrations

How this works

1Read the short explanations first — they teach you what you need before each question.
2Answer each question, then tap Check. A right answer moves you on automatically; if it's wrong, you'll see a friendly explanation of why.
3Finish all 3 steps to see your score — sign in and subscribe to unlock the full lesson and save it.

What's inside

9 questions and 1 quick teaching card, including:

✏️Fill in the blank — Type the missing word to complete the sentence.
🔘Multiple choice — Tap the answer you think is best, then check it.

👪Grown-up tip: sit alongside younger learners for the first few lessons. Read the questions together and chat about the explanations — that's where the real learning sticks.

Curriculum: AC9S8U01