Auroras occur when ions from the Sun strike air molecules, causing them to give off bright colors of light.-google
There are several differences between a physical and chemical change in matter or substances. A physical change in a substance doesn't change what the substance is. In a chemical change where there is a chemical reaction, a new substance is formed and energy is either given off or absorbed.
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Prevent any European country from growing much stronger than its neighbors.
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Yea pretty much it's 3.49
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