Question: Q: What gas is released by burning of fossil fuels and contributes to global warming? Choices: - nitrous oxide - hydrogen - helium - carbon dioxide A:
Answer: carbon dioxide

Question: Q: What happens when waves reach the shore? Choices: - diffuse and recede - surge and drown - repel and attract - topple and break A:
Answer: topple and break

Question: Q: What term is used to describe large numbers of species that go extinct in a short amount of time? Choices: - formation extinction - organic extinction - species extinction - mass extinction A:
Answer:
mass extinction