{
  "metadata": {
    "title_suggestion": "Water (example)"
  },
  "settings": {
    "shuffle_questions": false,
    "shuffle_options": true,
    "passing_score": 70,
    "show_explanation": true,
    "show_progress": true
  },
  "questions": [
    {
      "id": "q1",
      "type": "single_choice",
      "question": "At what temperature does pure water boil at sea level?",
      "options": [
        "90 °C",
        "100 °C",
        "110 °C",
        "120 °C"
      ],
      "correct_answer": "100 °C",
      "explanation": "At one atmosphere of pressure, pure water boils at 100 °C (212 °F)."
    },
    {
      "id": "q2",
      "type": "multiple_choice",
      "question": "Which elements make up a water molecule?",
      "options": [
        "Hydrogen",
        "Oxygen",
        "Carbon",
        "Nitrogen"
      ],
      "correct_answer": [
        "Hydrogen",
        "Oxygen"
      ],
      "explanation": "H₂O: two hydrogen atoms and one oxygen atom."
    },
    {
      "id": "q3",
      "type": "true_false",
      "question": "Ice floats on liquid water because it is less dense.",
      "options": [
        "True",
        "False"
      ],
      "correct_answer": "True",
      "explanation": "Water expands as it freezes, and its density drops to about 0.92 g/cm³."
    },
    {
      "id": "q4",
      "type": "short_answer",
      "question": "What is water turning from liquid into gas below its boiling point called?",
      "correct_answer": "Evaporation",
      "explanation": "It happens at the surface at any temperature, which is why laundry dries on the line without reaching 100 °C."
    }
  ]
}