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Stage in which a star’s outer layers have started to cool and grow outward?
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Observation and experimentation have led many scientists to accept a theory about the origin of the universe. this theory is called the big bang theory. scientific evidence collected and observed by scientists around the world suggests that the universe is ever expanding from a hot and dense initial state. what makes this a scientific theory? (2 points)
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Consider the following reaction where zinc metal is reacted with hydrochloric acid. What mass (g) of...
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