You will complete 21 required practical activities if you are studying GCSE Combined Science: Trilogy. You could be asked questions about the apparatus, methods, safety precautions, results, analysis and evaluation of these experiments.
There will be a number of different types of practical based questions. Some will be on the set required practicals, some will cover the working scientifically terms and some will be on other science practicals which you might have done in class. Use all the information given in the question particularly any diagrams to help you understand what the question is about.
This page contains AQA material which is reproduced by permission of AQA.
A student investigated the change in temperature when oils of different specific heat capacities were heated.
This is the method used:
a) What are the independent and dependent variables in the student’s investigation? [2 marks]
b) Give two safety precautions the student should have taken. [2 marks]
b) Any two of the following:
A student wants to calculate the density of the two objects shown below:
Describe the methods that the student should use to calculate the densities of the two objects. [6 marks]
Measure the length of the cube’s sides using a ruler  and use these to calculate volume of the cube . Submerge the statue in water  and measure the volume of water displaced . Measure the mass of each object using a balance  and calculate the density using: ρ = m ÷ V .
You will need to describe both methods and include the density equation. Steps should be logically ordered so that they could be followed by someone else to obtain valid results. You could include the following ideas: