How do scientists know so much? Watch Mystery Doug as he shares more about this. 1. Watch the video. 2. Choose an object and make a scientific sketch in your science notebook or on a piece of paper cut in half. Using a half sheet of paper will make your work just the write size to glue into your science notebook. 3. Instead of labels write things you wonder. Use arrows to show what your questions are about. Listen to the instructions in the template.