The formation of photochemical smog is a result of a series of reactions between chemicals in the atmosphere and light. Volatile organic compounds (VOCs) interact with nitric oxide to form ozone and other secondary pollutants. What is the most likely source of VOCs? A) evaporation from gasoline B) emissions from volcanic activity C) sublimation from decaying animal waste D) evaporation from volatile compounds in sidewalks

Melissa lives in a town called greendale. she discovers that when she lights a match and holds it near her kitchen faucet, the little flame grows into a larger fire. melissa is surprised because she thought the water would extinguish the flame rather than ignite it further. her mother tells her that the water might be contaminated with dissolved methane, a primary component in natural gas. melissa investigates the matter and finds that cases of methane contamination started shortly after a company began fracking for natural gas in the area. based on this information, which three statements are plausible consequences of fracking in greendale?

Which organisms have pharyngeal arches that develop from all three germ layers and go through the same development stages as embryos? 1.bird 2.ladybug 3.starfish 4.snake

Select the true statements about eubacteria. most live as decomposers and heterotrophs. most only thrive in a narrow range of environments. certain eubacteria are responsible for food poisoning. eubacteria thrive in extreme environments.