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

Q: Group 13 of the periodic table is also called what? Choices: - nitrogen group - iron group - manganese group - the boron group A:
the boron group

Q: The oxygen regions of the water molecules have what kind of charge? Choices: - positive - neutral - certain - negative A:
negative

Q: What light-producing process occurs when a substance absorbs shorter-wavelength ultraviolet light and then gives off the energy as visible light? Choices: - candescence - resistance - luminescence - fluorescence A:
fluorescence