Question: Q: What compound gives tarnished copper it's green color? Read this paragraph and choose the correct option from the provided answers: A: The copper has become tarnished. The tarnishalso called patinais a compound called copper carbonate, which is green. Copper carbonate forms when copper undergoes a chemical reaction with carbon dioxide in moist air. The green patina that forms on copper actually preserves the underlying metal. That's why it's not removed from the statue. Some people also think that the patina looks attractive. Choices: - bronze - zinc - brass - copper carbonate A:
Answer: copper carbonate

Question: Q: What is the only continent without amphibians? Read this paragraph and choose the correct option from the provided answers: Amphibians can be found in freshwater and moist terrestrial habitats throughout the world. The only continent without amphibians is Antarctica. Amphibians are especially numerous in temperate lakes and ponds and in tropical rainforests. Choices: - Australia - Europe - Africa - antarctica A:
Answer: antarctica

Question: Q: What lens shape corrects myopia? Read this paragraph and choose the correct option from the provided answers: Myopia is corrected with a concave lens, while hyperopia is corrected with a convex lens. Choices: - flat - convex - curve - concave A:
Answer:
concave