Which of the following substances will float in water?

• A. Iron (density = 7.87 g/cm^3)
• B. Aluminum (density = 2.70 g/cm^3)
• C. Ice (density = 0.92 g/cm^3)
• D. Copper (density = 8.96 g/cm^3)

Answer: (C)

Verified step by step guidance

1. Understand that whether a substance floats or sinks in water depends on its density compared to the density of water. Water has a density of approximately 1.00 g/cm\^3 at room temperature.
2. Recall the principle: A substance will float in water if its density is less than the density of water, and it will sink if its density is greater.
3. Compare the given densities of each substance to the density of water: Iron (7.87 g/cm\^3), Aluminum (2.70 g/cm\^3), Ice (0.92 g/cm\^3), Copper (8.96 g/cm\^3).
4. Identify which substances have densities less than 1.00 g/cm\^3. These substances will float in water.
5. Conclude that the substance with a density less than water's density will float, while those with higher densities will sink.