OSTP Science Grade 5 Practice Questions - Oklahoma School Testing Program - Science, Grade 5 Exam

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A student places 10 grams of white sugar into a glass containing 100 grams of warm water and stirs until the sugar crystals disappear. The liquid remains completely clear. The student then measures the total mass of the glass and liquid. Which statement best describes the properties of the sugar in this phenomenon?

The sugar dissolved in the water, forming a clear solution, and its mass was conserved. The sugar was destroyed by the warm water, decreasing the total mass of the system. The sugar underwent a chemical change because it became an invisible gas. The sugar settled at the bottom of the glass because it is insoluble in water.

Correct Answer:

The sugar dissolved in the water, forming a clear solution, and its mass was conserved.

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