A student investigated the effect of temperature on the rate of diffusion of a dye through agar jelly. The results are shown in the table. | Temperature (°C) | Distance diffused in 10 minutes (mm) | |---|---| | 10 | 3.2 | | 20 | 5.8 | | 30 | 8.1 | | 40 | 11.5 | Which conclusion is supported by these results?

Q: How do I try a free CIE Biology question?

Just tap any of the four options on this page — no signup, no card, nothing to install. You'll see the correct answer and a full mark-scheme-style explanation within a second. Each visit shows a fresh randomly-picked question from the live CIE IGCSE Biology bank, so you can keep refreshing to try different ones before deciding whether to create a free account for daily access.

Q: Is Kramizo really free for CIE Biology students?

Yes — completely free. Every student gets 45 questions a day on the free plan, across any board and any subject, with no card required and no trial countdown. Kramizo's optional Pro plan removes the daily cap and adds analytics, but the free plan is genuinely free forever. We make money from the small percentage of students who choose to upgrade — not from selling data or ads.

Q: Are the Biology questions aligned to the CIE IGCSE syllabus?

Every question is written against the published CIE IGCSE Biology syllabus and reviewed for accuracy before being added to the bank. We match the command words (state, describe, explain, evaluate), mark allocations, and difficulty tier you'll see on real CIE past papers. Explanations are written in the style of official examiner mark schemes so students learn exactly what marks are being awarded for.

Question

A student investigated the effect of temperature on the rate of diffusion of a dye through agar jelly. The results are shown in the table. | Temperature (°C) | Distance diffused in 10 minutes (mm) | |---|---| | 10 | 3.2 | | 20 | 5.8 | | 30 | 8.1 | | 40 | 11.5 | Which conclusion is supported by these results?

Accepted Answer

The rate of diffusion increases as temperature increases — Award 1 mark for recognizing that as temperature increases, distance diffused increases, indicating faster diffusion rate. A is incorrect — the data shows the opposite trend. C is incorrect — there is a clear positive relationship. D is incorrect — the fastest rate is at 40°C (greatest distance).

Answer

The rate of diffusion increases as temperature increases

Answer

The rate of diffusion is fastest at 10°C

Answer

Temperature has no effect on the rate of diffusion

Answer

The rate of diffusion decreases as temperature increases

One real Biology question.No signup. 30 seconds.

One real Biology question.
No signup. 30 seconds.