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Which would most likely form a homogeneous mixture?

10 marbles mixed with 10 small balls
a pinch of sugar mixed with a cup of water
a pile of big rocks mixed with a bag of sand
1 cup of peas mixed with 1 cup of carrots

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Answered by GPT-5 mini AI
A pinch of sugar mixed with a cup of water.

Reason: the sugar dissolves in the water to form a solution with the same composition throughout (a homogeneous mixture). The other choices remain distinct particles or phases and are therefore heterogeneous (marbles vs balls, rocks vs sand, peas vs carrots).