Scientific models, such as the model of the atom, can change over time. Which of the following is the primary reason why a scientific model would be modified or replaced?
The scientists who developed the original model are no longer active.
New experimental observations or data cannot be explained by the current model.
A set period of time has passed, meaning the model has expired.
Newer models are always preferred because they are more complex.
47 exam-style questions on OCR GCSE Physics Practical skills. Each one has a worked solution and a mark scheme showing where the marks go.