3. Which environmental factor(s) affect skin color? A. Sunlight
b. Ultraviolet light
c. X-rays
d. All of the above

Match the pollutants. 1. a chlorofluorocarbon smoke 2. a biodegradable organophosphate insecticide freon 3. particle pollution paint 4. hazardous waste monoxide 5. carbon is completely burned malathion 6. carbon is incompletely burned dioxide

Me the formula cacl2 represents the compound

Drag the tiles to the correct boxes to complete the pairs. match each cell organelle with its description.