Practical skills
This lesson builds specific heat capacity practical method and evaluation for GCSE Physics.
Use the core lesson first, then match the exam-board guidance to your school route. Many pupils meet this content through Combined Science as well as Separate Physics.
What you will learn
Exam-board fit
Exact paper labels and specification-point numbering vary by board and cohort, so match this lesson to your school route before using past-paper questions.
Specific heat capacity method supplied on this page
Use the metal block data and method prompts to practise calculation, graph use and evaluation.
Clear explanation
This practical measures how much energy is needed to raise the temperature of a material. You measure the mass, supply energy with an electrical heater and record the temperature rise.
Energy can be measured directly with a joulemeter or calculated from potential difference, current and time. The temperature change must be the final temperature minus the starting temperature.
Insulation reduces energy transfer to the surroundings. Repeats and a graph of energy against temperature change can make the result more reliable.
Key graph
Worked examples
Calculating specific heat capacity
A 1.5 kg block receives 13 500 J and warms by 10 degrees Celsius.
c = energy ÷ (mass x temperature change)
c = 13 500 ÷ (1.5 x 10) = 900
Quick checks
Choose an answer, then check your thinking.
1. Why is insulation used around the block?
2. Which temperature value goes into the equation?
Practice questions
Question 1
A 2 kg block receives 8000 J and warms by 5 degrees Celsius. Calculate specific heat capacity.
Reveal answer and marking guidance
Answer: 800 J/kg degrees Celsius.
Marking: Credit c = 8000 ÷ (2 x 5) = 800 J/kg degrees Celsius.
Question 2
Name the independent variable if a student plots energy supplied against temperature change.
Reveal answer and marking guidance
Answer: Energy supplied.
Marking: Credit the variable deliberately increased or recorded on the x-axis if that method is used.
Question 3
Give one source of uncertainty in this practical.
Reveal answer and marking guidance
Answer: Energy lost to surroundings, thermometer resolution, poor thermal contact or timing uncertainty.
Marking: Credit a realistic source linked to the method.
Question 4
Why should the heater fit closely into the block?
Reveal answer and marking guidance
Answer: To transfer energy to the block efficiently and reduce energy lost elsewhere.
Marking: Credit better thermal contact and reduced unwanted transfer.
Exam practice ladder
Answers and marking guidance
The exact practice answers are hidden under each question so you can try first. For this lesson, marks come from using the correct physics model, choosing the right equation where needed, keeping units with values, and explaining changes with precise words such as transfer, resultant force, acceleration, evidence and uncertainty.
Common mistakes
- Using final temperature instead of temperature change.
- Forgetting the mass in the equation.
- Ignoring energy transfer to the surroundings.
- Writing specific heat capacity without units.
Exam-board guidance
All supported routes assess the core physics idea, but they may group topics, practicals and paper wording differently.
AQA GCSE Physics
AQA GCSE Physics: use this lesson for specific heat capacity practical method and evaluation, then check whether your class is taking Separate Physics or Combined Science.
OCR GCSE Physics
OCR GCSE Physics: the core physics idea is shared, but Gateway and Twenty First Century may organise questions differently.
Pearson Edexcel GCSE Physics
Pearson Edexcel GCSE Physics: practise the concept, the equation use and the practical language because questions often connect them.
Eduqas GCSE Physics
Eduqas GCSE Physics: learn the core explanation and practise applying it to unfamiliar contexts, data and practical questions.
WJEC Wales
WJEC Wales: check whether your class is using the current GCSE Physics route or a newer science route, then use this lesson for the shared physics idea.
CCEA GCSE Physics
CCEA GCSE Physics: connect the idea to your unit and remember that practical skills are assessed directly.
Extension challenge
Explain how a graph of energy supplied against temperature change could be used to find specific heat capacity from the gradient.
Reveal answer
Example answer: A strong extension response names the physics model, uses accurate units and explains why the evidence supports the conclusion.
Next lesson
Next, continue with Required Practical: I-V Characteristics.