[{"id": 1, "type": "multiple_choice", "options": ["Barometer", "Rain gauge", "Anemometer", "Thermometer"], "question": "What instrument measures temperature?", "correct_answer": "Thermometer"}, {"id": 2, "type": "multiple_choice", "options": ["Soil, darkness, and oxygen", "Sand, ice, and nitrogen", "Wind, rocks, and heat", "Sunlight, water, and carbon dioxide"], "question": "What do plants need to make their own food through photosynthesis?", "correct_answer": "Sunlight, water, and carbon dioxide"}, {"id": 3, "type": "short_answer", "question": "Describe one key concept you learned about \"Gravity Practice\" in your own words.", "correct_answer": null}, {"id": 4, "type": "multiple_choice", "options": ["Light, dark, gray", "Solid, liquid, gas", "Big, medium, small", "Hot, cold, warm"], "question": "What are the three states of matter?", "correct_answer": "Solid, liquid, gas"}, {"id": 5, "type": "true_false", "question": "The Earth rotates on its axis once every 24 hours, causing day and night.", "correct_answer": "True"}]