Which statement is true of all chemical reactions? A. They can go in just one direction. B. They occur only in science labs. C. They break and reform bonds D. They create new elements.

warm front forms when a moist, warm air mass slides up and over a cold air mass. as the warm air mass rises, it condenses into a broad area of clouds. a warm front brings gentle rain or light snow, followed by warmer, milder weather.

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