Answer the following question given this paragraph: Types of radiation that cause cancer include ultraviolet (UV) radiation and radon. UV radiation is part of sunlight. It is the leading cause of skin cancer. Radon is a naturally occurring radioactive gas that escapes from underground rocks. It may seep into the basements of buildings. It can cause lung cancer. Q: Types of radiation that cause cancer include ultraviolet (uv) radiation and what? Choices: - thermal - molecular - vibrational - radon A:
radon

Answer the following question given this paragraph: Mariana Ruiz Villarreal (LadyofHats) for CK-12 Foundation. The nitrogen cycle tracks the flow of nitrogen through an ecosystem . CC BY-NC 3.0. Q: Which cycle tracks the flow of nitrogen through an ecosystem? Choices: - nitrogen reaction - water cycle - life cycle - nitrogen cycle A:
nitrogen cycle

Answer the following question given this paragraph: In shallow water close to shore, waves start to drag on the bottom of the water. The bottomsbut not the topsof the wave slow down because of friction. This causes the waves to steepen until they break and fall over, carrying water onto the shore as surf. Q: The bottomsbut not the topsof the wave slow down because of what? Choices: - size - vibration - temperature - friction A:
friction