[{"id": 1, "type": "multiple_choice", "options": ["CO₂", "NaCl", "H₂O", "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": ["Red, gray, black", "Hard, soft, medium", "Large, small, tiny", "Igneous, sedimentary, metamorphic"], "question": "What are the three types of rocks?", "correct_answer": "Igneous, sedimentary, metamorphic"}, {"id": 4, "type": "true_false", "question": "The scientific method always begins with making an observation or asking a question.", "correct_answer": "True"}, {"id": 5, "type": "multiple_choice", "options": ["Nucleus", "Mitochondria", "Ribosome", "Cell membrane"], "question": "What organelle is known as the \"powerhouse of the cell\"?", "correct_answer": "Mitochondria"}, {"id": 6, "type": "true_false", "question": "The scientific method always begins with making an observation or asking a question.", "correct_answer": "True"}, {"id": 7, "type": "multiple_choice", "options": ["O₂", "CO₂", "NaCl", "H₂O"], "question": "What is the chemical symbol for water?", "correct_answer": "H₂O"}, {"id": 8, "type": "multiple_choice", "options": ["Ribosome", "Mitochondria", "Nucleus", "Cell membrane"], "question": "What organelle is known as the \"powerhouse of the cell\"?", "correct_answer": "Mitochondria"}]