Verification of truth — physical properties (density of ice vs liquid water): “Ice-cube floats on water.” Choose the most accurate frequency statement.

Introduction / Context:
This tests knowledge of density and buoyancy. Pure ice at typical temperatures is less dense than liquid water, so it displaces a mass of water equal to its weight before being fully submerged, hence it floats.

Given Data / Assumptions:

• Ordinary conditions near standard pressure.
• Ice composition: normal frozen water (no dense contaminants heavily altering density).
• Liquid is water (fresh or even saline to common extents).

Concept / Approach:
Archimedes’ principle: a body immersed in a fluid experiences an upward buoyant force equal to the weight of fluid displaced. Since ρ(ice) < ρ(water), equilibrium occurs with some volume above the surface.

Step-by-Step Solution:
Compare densities: ice (~0.917 g/cm^3) vs water (~1.0 g/cm^3 at ~4°C).Because ice is less dense, it floats with a fraction above surface (typ. ~9%).

Verification / Alternative check:
Even in seawater (denser than fresh), floating is reinforced. Only exotic conditions (e.g., supercooled phases, unusual additives) could disrupt this, which are outside normal understanding of “ice cube” and “water.”

Why Other Options Are Wrong:
“Sometimes/Generally” understate a fundamental property; “Never” contradicts everyday observation and physics.

Common Pitfalls:
Confusing other solids (which may sink) with ice; assuming bubbles are required (they are not).

Final Answer:
Always