ATLAS Science Grade 7 Practice Questions - Arkansas ATLAS Science - Grade 7 Exam

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A closed bottle contains a solid and a liquid that react to produce a gas. The total mass of the sealed bottle and contents is measured before and after the reaction. What result supports conservation of mass?

Mass after is greater because gas has extra mass that appears from nowhere Mass after is less because gas has no mass Mass stays the same because atoms are rearranged, not created or destroyed Mass doubles because both a solid and a liquid were used

Correct Answer:

Mass stays the same because atoms are rearranged, not created or destroyed

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