Which type of ice is considered the strongest form that can form?

• A. Slush ice
• B. Frazil ice
• C. Clear ice
• D. Rotten ice

Answer: (C)

Clear ice is the strongest form because it forms as water freezes slowly with minimal impurities and air. As the ice crystals grow, air and contaminants are expelled and the crystals align into a tight, uniform lattice. That dense, homogeneous structure resists cracks and can bear heavier loads than ice that traps air pockets or contains liquid water within it.

Frazil ice forms in turbulent water as loose crystals, slush ice has many voids and pockets of water, and rotten ice is decayed and structurally weakened. These types introduce weakness and fail under stress, making them less capable of supporting weight than clear ice. So, when thinking about strength, clear ice stands out as the best-forming, strongest option.