AQA GCSE Chemistry revision • Unit 10 Using resources

Can you spot the exact controlled variable on this GCSE Chemistry question? with AI Marker.

Use this AQA GCSE Chemistry revision page to focus on a Foundation question from Unit 10 Using resources about alloys as useful materials. You can practise GCSE Chemistry exam questions, check exactly what the mark scheme is looking for, and build confidence with structured GCSE exam practice. AI Marker gives you access to 75,000+ GCSE questions, instant AI marking, and Mentor — an AI Tutor built for GCSE revision.

View the question Explore 75,000+ questions
aimarker.co.uk/gcse/aqa/chemistry/foundation/unit-10-using-resources/ify7we2kcs/name-one-variable-that-the-student-controls-in-this-experiment/
AQA • Chemistry • Unit 10 Using resources

Name one variable that the student controls in this experiment.

Mentor — AI Tutor ready1

Reveal the mark-scheme guidance, then use AI Marker for structured GCSE question practice and instant marking.

What this page helps you revise
AQA GCSE ChemistryGCSE Chemistry revisionGCSE exam questionsGCSE questions and answersmark-scheme guidanceexam practiceinstant AI markingMentor AI TutorAQA GCSE Chemistry revisionUnit 10 Using resources GCSE revision
Question • answer • tutor explanation

Try the question before revealing the answer

Read the wording carefully, decide what earns the marks, then open the answer and clear Mentor explanation.

AQAGCSEChemistryFoundation1 mark
GCSE revision question
Question context

A student investigates the effect of adding different amounts of zinc to copper to make brass. The student controls the temperature and stirring time during alloy formation and records the hardness of each sample.

Name one variable that the student controls in this experiment.

Show answer, mark scheme and Mentor explanation
Answer and mark-scheme guidance

MP1: Temperature OR stirring time

Mentor — AI Tutor

Can you secure the mark by naming one controlled variable?

This 1-mark question is testing whether you can identify a variable the student keeps the same during the experiment. From the context, the controlled variables are the temperature and the stirring time during alloy formation. Naming either one earns the mark.

Quick takeaway: For this question, one of these exact ideas gets the mark: temperature or stirring time.

GCSE Chemistry revision: what this question is really testing

In AQA GCSE Chemistry questions like this, you need to separate the variable being changed from the variables being controlled. Here, the experiment changes the amount of zinc added to copper, but the mark scheme rewards a variable that is kept constant. That is why the answer must be temperature or stirring time. Use this kind of GCSE mark scheme guidance to sharpen your exam technique for GCSE Chemistry questions and answers, especially in Unit 10 Using resources GCSE revision and alloys as useful materials GCSE3

Start GCSE revision free
75,000+ GCSE questions
Instant AI marking
Mentor — AI Tutor help