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A substance with lower density floats on a substance with higher density. This explains why ice floats on liquid water, whereas many other solids sink to the bottom of liquid water. In a large body of water, such as a lake or the ocean, the water with the greatest density always sinks to the bottom. Water is most dense at about 4°C.
Unique solid form: Water has a unique solid form, in which the hydrogen bonds between water molecules form a crystal lattice structure that is less dense than liquid water. This property causes ice to float on water and provides insulation for aquatic organisms during the winter months.
When frozen, ice is less dense than liquid water (the molecules are farther apart). This means that ice floats on the surface of a body of water (Figure \(\PageIndex{2}\)b). In lakes, ponds, and oceans, ice will form on the surface of the water, creating an insulating barrier to protect the animal and plant life beneath from freezing in the water.
When frozen, ice is less dense than liquid water (the molecules are farther apart). This means that ice floats on the surface of a body of water (Figure 2.9b). In lakes, ponds, and oceans, ice will form on the surface of the water, creating an insulating barrier to protect the animal and plant life beneath from freezing in the water.
In lakes and ponds, ice will form on the surface of the water creating an insulating barrier that protects the animals and plant life in the pond from freezing. Without this layer of insulating ice, plants and animals living in the pond would freeze in the solid block of ice and could not survive.
16 maj 2020 · Definition. The water cycle or hydrologic cycle describes the complex systems that allow water to move across the Earth and atmosphere. The most basic step of the water cycle is the change of state of water as a liquid, gas or solid in the atmosphere.
