{
 "label": "full-catalogue__express__haiku-5-5__run2",
 "task": "T1",
 "format": "express",
 "model_id": "claude-haiku-5-5",
 "messages": [
  {
   "version": "v0.9.1",
   "create_surface": {
    "surface_id": "main",
    "catalog_id": "https://a2uicatalog.ai/catalog/a-full.json"
   }
  },
  {
   "version": "v0.9.1",
   "update_components": {
    "surface_id": "main",
    "components": [
     {
      "id": "title",
      "component": "heading",
      "text": "The Water Cycle"
     },
     {
      "id": "intro",
      "component": "body",
      "text": "Water never leaves Earth. It moves endlessly between oceans, air and land in a loop called the water cycle. This lesson covers three core processes, works through one example, and ends with a short self-check."
     },
     {
      "id": "evap_h",
      "component": "subheading",
      "text": "1. Evaporation"
     },
     {
      "id": "evap_b",
      "component": "body",
      "text": "The sun heats water at the surface of oceans, lakes and rivers. Fast-moving molecules break free as water vapour and rise into the air. Plants also release vapour through their leaves, a process called transpiration."
     },
     {
      "id": "cond_h",
      "component": "subheading",
      "text": "2. Condensation and precipitation"
     },
     {
      "id": "cond_b",
      "component": "body",
      "text": "As warm vapour rises it cools and turns back into tiny droplets around dust and salt particles, forming clouds. When droplets grow heavy enough they fall as precipitation: rain, snow, sleet or hail."
     },
     {
      "id": "coll_h",
      "component": "subheading",
      "text": "3. Collection and runoff"
     },
     {
      "id": "coll_b",
      "component": "body",
      "text": "Precipitation gathers in rivers, lakes, groundwater and glaciers. Water flows downhill as runoff or soaks into the ground, eventually reaching the sea, where evaporation starts the cycle again."
     },
     {
      "id": "div1",
      "component": "divider"
     },
     {
      "id": "ex_h",
      "component": "subheading",
      "text": "Worked example: a puddle after rain"
     },
     {
      "id": "ex_intro",
      "component": "body",
      "text": "A 2 cm deep puddle forms after a storm. Follow what happens to its water over one sunny day."
     },
     {
      "id": "ex_steps",
      "component": "steps",
      "items": [
       {
        "label": "Morning",
        "text": "Sunlight warms the puddle. Some water molecules gain enough energy to escape as vapour."
       },
       {
        "label": "Midday",
        "text": "The puddle shrinks as evaporation speeds up. The vapour rises and cools in the air above."
       },
       {
        "label": "Afternoon",
        "text": "Cooling vapour condenses into small clouds. No rain falls, so the vapour stays in the air."
       },
       {
        "label": "Evening",
        "text": "The puddle is gone. Its water is now in the atmosphere, ready to fall again as precipitation."
       }
      ]
     },
     {
      "id": "ex_callout",
      "component": "callout",
      "kind": "tip",
      "title": "Key idea",
      "text": "Water changes state but is never destroyed. The total amount of water on Earth stays roughly constant."
     },
     {
      "id": "div2",
      "component": "divider"
     },
     {
      "id": "check_h",
      "component": "subheading",
      "text": "Self-check"
     },
     {
      "id": "quiz",
      "component": "quiz_set",
      "title": "Check your understanding",
      "pass_score": 67,
      "questions": [
       {
        "question": "Which process turns water vapour back into liquid droplets?",
        "options": [
         "Evaporation",
         "Condensation",
         "Runoff",
         "Transpiration"
        ],
        "correct": 1,
        "explanation": "Condensation happens when vapour cools and forms droplets, which build up into clouds."
       },
       {
        "question": "What is the main energy source that drives evaporation?",
        "options": [
         "The moon",
         "Wind",
         "The sun",
         "Gravity"
        ],
        "correct": 2,
        "explanation": "Solar heating gives water molecules the energy they need to escape into the air."
       },
       {
        "question": "In the worked example, why did the puddle disappear without any rain?",
        "options": [
         "It drained into the ground",
         "It evaporated into the atmosphere",
         "It froze",
         "It was absorbed by plants"
        ],
        "correct": 1,
        "explanation": "Evaporation moved the water from the puddle into the air as vapour."
       }
      ]
     },
     {
      "id": "root",
      "component": "color_section",
      "blocks": [
       "title",
       "intro",
       "evap_h",
       "evap_b",
       "cond_h",
       "cond_b",
       "coll_h",
       "coll_b",
       "div1",
       "ex_h",
       "ex_intro",
       "ex_steps",
       "ex_callout",
       "div2",
       "check_h",
       "quiz"
      ]
     }
    ]
   }
  }
 ]
}