He is mad and kills everyone that came to the exhibit
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a control variable is a variable or an element wich is held constant throughout an experiment o a research in order to assess the relationship between multiple variables.
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Formation. Our solar system formed about 4.5 billion years ago from a dense cloud of interstellar gas and dust. The cloud collapsed, possibly due to the shockwave of a nearby exploding star, called a supernova. When this dust cloud collapsed, it formed a solar nebula—a spinning, swirling disk of material.
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Explanation:
