For Step 2 of the Jeans example

• Carefully analyse the model, its components and what it is trying to show.
• Identify the elements of the model in the photo.
• Put a transparent sheet or tracing paper over the photo.
• Outline the main elements (e.g., mountain range, sea, building…) using tracing paper or transparent sheet.
• Take the photo away and compare the new model you have drawn of the given model.