WHAT ELEMENT IS THIS: My name comes from the Greek word for ‘moon’. I am used as a semiconductor and used to make color glass red. I am somewhere in Period 4 and my atomic mass is at least 78 but not greater than 80

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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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it would only be the stuff in module eight so you need to study all the lessons in that you also could check the flvs

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