{"question": "Which gas do plants take in from the air for photosynthesis?", "options": ["Oxygen", "Carbon dioxide", "Helium", "Neon"], "answer": 1}
{"question": "What is the main reason the Moon shows phases?", "options": ["Earth's shadow covers it", "Clouds block it", "We see different amounts of its sunlit half", "It changes size"], "answer": 2}
{"question": "Which material is the best conductor of electricity?", "options": ["Rubber", "Copper", "Glass", "Wood"], "answer": 1}
{"question": "What happens to water when it freezes?", "options": ["It becomes a gas", "It contracts a lot", "It turns into a solid", "It disappears"], "answer": 2}
{"question": "Which part of a plant mainly absorbs water from the soil?", "options": ["Leaves", "Flowers", "Roots", "Petals"], "answer": 2}
{"question": "A ball is dropped and speeds up as it falls. Which force causes this?", "options": ["Magnetism", "Gravity", "Friction", "Static electricity"], "answer": 1}
{"question": "Which is an example of a chemical change?", "options": ["Ice melting", "Paper tearing", "Iron rusting", "Sugar dissolving"], "answer": 2}
{"question": "What do we call an animal that eats only plants?", "options": ["Carnivore", "Herbivore", "Predator", "Scavenger"], "answer": 1}
{"question": "Which layer of Earth is made mostly of liquid metal?", "options": ["Crust", "Outer core", "Mantle", "Atmosphere"], "answer": 1}
{"question": "Why do we see lightning before we hear thunder?", "options": ["Light travels faster than sound", "Sound is stopped by clouds", "Thunder happens later", "Eyes are faster than ears"], "answer": 0}
{"question": "Which tool is best for measuring the volume of a liquid?", "options": ["Ruler", "Thermometer", "Graduated cylinder", "Balance"], "answer": 2}
{"question": "Which of these is a renewable energy source?", "options": ["Coal", "Natural gas", "Solar", "Oil"], "answer": 2}