Independent final check

Explain without the key

calculate / explain

Final check

calculate: work out the answer from the data. explain: give reasons and connect them to evidence.

Two agar cubes are put in the same acid. Cube P has sides of 1 cm; cube Q has sides of 4 cm. (a) Calculate the surface area to volume ratio of cube Q. (b) Which cube clears first? Give two reasons.

Give your answer with its unit

Type numbers like 0.25 or 2.5x10^-3. Put the unit in its own box, for example g, cm3 or m/s. Leave the unit box empty if the quantity has no unit.

(a) Surface area : volume of Q

Number

Unit

(b) Which cube clears first? Give two reasons.

Your saved work

Answers and earlier attempts stay in this browser. Export a copy to keep, to move to another device or to hand to your teacher. Importing a copy keeps your current answers and adds earlier attempts.

Import saved work

Scope and sources

Cambridge IGCSE Biology 0610 · 2026–2028 v3 · Original learning materials.

Diffusion as the net movement of particles down a concentration gradient, its energy and the four factors (3.1.1, 3.1.2, 3.1.5) through the agar-cube practical; diffusion through cell membranes and its importance for gases and solutes (3.1.3, 3.1.4); active transport (3.3.1) with root hairs and protein carriers (Supplement 3.3.2–3.3.3). Osmosis is in the next module. Times in the experiment come from a teaching model.

Apparatus, amounts and times in the experiment are illustrative. Real practical work follows a teacher-approved safety method.

Official Cambridge syllabus