1. Is the reaction between magnesium and oxygen in the air spontaneous?
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What causes most sediment to wash or fall into a river

What causes different colors to appear in the sky? the absorption of light by air molecules the reflection of light by bodies of water the greenhouse effect in earth's atmosphere the scattering and reflection of light by dust particles

How do limiting factors most affect population size? ostop population growthrestrict population growthincrease population sizeresult in positive impactso