WVGSA Grade 8 Science Practice Questions - West Virginia General Summative Assessment Grade 8 Science Exam

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Students perform an experiment combining solution X and solution Y. Which observation provides definitive evidence that a chemical reaction occurred?

Solution X mixed uniformly with solution Y An insoluble solid (precipitate) formed and settled at the bottom of the beaker The total volume equaled the sum of both individual solutions The liquid became warmer when heated on a hot plate

Correct Answer:

An insoluble solid (precipitate) formed and settled at the bottom of the beaker

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