Q: Types of radiation that cause cancer include ultraviolet (uv) radiation and what? A:
OPTIONS:
- thermal
- molecular
- vibrational
- radon

Answer: radon

Q: Which cycle tracks the flow of nitrogen through an ecosystem? A:
OPTIONS:
- nitrogen reaction
- water cycle
- life cycle
- nitrogen cycle

Answer: nitrogen cycle

Q: The bottomsbut not the topsof the wave slow down because of what? A:
OPTIONS:
- size
- vibration
- temperature
- friction

Answer:
friction