Step 5 - Carrying out the experiment
Before they carry out their experiment it is important that the teacher makes sure that the procedure to be followed is safe. For this reason it is important to include a TEACHER CHECKPOINT before the pupils are allowed to continue with the practical and to ensure that suitable safety precautions are used.
The pupils collect evidence by carrying out the experiment and carefully noting the changes occurring in the dependent variable. They may also measure the variables they are keeping constant to ensure that they are kept constant throughout their experimental procedure.