RISE Science Grade 6 Practice Questions - RISE Science - Grade 6 Exam

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A student measures 100 grams of liquid water and 15 grams of table salt. She stirs the salt into the water until it completely dissolves and disappears from view. What will be the final mass of the saltwater solution?

100 grams, because the salt dissolved and lost all its mass. 115 grams, because total mass is conserved during physical dissolving. 85 grams, because dissolving causes some water to evaporate instantly. 130 grams, because salt particles react with water to gain mass.

Correct Answer:

115 grams, because total mass is conserved during physical dissolving.

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