AP Biologyeasymcq1 pt
Why does ice float on liquid water?
A.Ice's hydrogen-bonded lattice spaces molecules farther apart
B.Ice traps air bubbles that lift it
C.Ice is warmer than the liquid below
D.Liquid water has stronger hydrogen bonds
Explanation
Core Concept
In ice each water molecule hydrogen-bonds to four neighbors in an open lattice, lowering density below liquid water's. Floating ice insulates lakes so aquatic life survives winter.
Correct Answer
AIce's hydrogen-bonded lattice spaces molecules farther apart
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