Q: Smoking increases the risk of cancer from what radioactive gas that can also be detected with a test kit for your home? Choices: - arsenic - carbon monoxide - carbon dioxide - radon A:
radon

Q: Which part of an earthquake is in the ground where the ground breaks? Choices: - the epicenter - the tectonic plate - the fault - the focus A:
the focus

Q: The water cycle is powered by energy from where? Choices: - atmosphere - earth - living things - sun A:
sun

Q: The outer layer of what anatomical structure is so tough that it keeps out most pathogens? Choices: - liver - steel - bark - skin A:
skin