Question: Q: What are the main organs for breathing in a mammal? Choices: - gills - nostrils - intestines - lungs A:
Answer: lungs

Question: Q: The mixture of gases that surrounds the planet and makes up the atmosphere is known as ________. Choices: - energy - vaccum - fuel - air A:
Answer: air

Question: Q: What are the highest clouds in the atmosphere? Choices: - alto clouds - nebulous clouds - silicic clouds - noctilucent clouds A:
Answer:
noctilucent clouds