[{"id": 1, "type": "multiple_choice", "options": ["H₂O", "NaCl", "CO₂", "O₂"], "question": "What is the chemical symbol for water?", "correct_answer": "H₂O"}, {"id": 2, "type": "true_false", "question": "The scientific method always begins with making an observation or asking a question.", "correct_answer": "True"}, {"id": 3, "type": "multiple_choice", "options": ["Large, small, tiny", "Red, gray, black", "Igneous, sedimentary, metamorphic", "Hard, soft, medium"], "question": "What are the three types of rocks?", "correct_answer": "Igneous, sedimentary, metamorphic"}, {"id": 4, "type": "multiple_choice", "options": ["O₂", "NaCl", "CO₂", "H₂O"], "question": "What is the chemical symbol for water?", "correct_answer": "H₂O"}, {"id": 5, "type": "true_false", "question": "The scientific method always begins with making an observation or asking a question.", "correct_answer": "True"}]