Answer the following question given this paragraph: The respiratory system is responsible for breathing. Q: What system of the body is generally responsible for breathing? Choices: - excretory - integumentary - cardiac - respiratory system A:
respiratory system

Answer the following question given this paragraph: There are two basic types of pollutants in air. They are known as primary pollutants and secondary pollutants. Q: What are two basic types of pollutants in the air? Choices: - smog and coal - organic and inorganic - pesticides and smog - primary and secondary pollutants A:
primary and secondary pollutants

Answer the following question given this paragraph: Alkali metals are all solids at room temperature. They are relatively soft and low in density. Q: What property are alkali metals at room temperature? Choices: - mixed - liquid - solid - solid A:
solid