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Which of the following accurately relates the emergent properties of water to the effects of global warming in the Arctic?
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2. Cell Chemistry & Cell Components
Properties of Water- Density
Multiple Choice
Solid substances are normally more dense than liquid substances. However, solid ice is LESS dense than liquid water. Why is this characteristic of solid ice important for life?
A
This characteristic allows lakes to freeze solid.
B
This characteristic allows the surface water of lakes to freeze.
C
This characteristic ensures that salt water does not freeze.
D
This characteristic is not important for life.
검증된 단계별 안내1
Understand the concept of density: Density is defined as mass per unit volume. Typically, solids are denser than their liquid forms because their molecules are packed more tightly together.
Recognize the unique property of water: Unlike most substances, water expands when it freezes. This is due to the hydrogen bonding in water molecules, which forms a crystalline structure in ice that takes up more space than in liquid form.
Relate this property to ice's density: Because ice expands and occupies more volume, it becomes less dense than liquid water. This is why ice floats on water.
Consider the ecological impact: When ice forms on the surface of bodies of water, it insulates the water below, maintaining a relatively stable environment for aquatic life during cold periods.
Conclude the importance for life: The floating ice layer prevents entire bodies of water from freezing solid, allowing life to survive beneath the ice during winter months. This characteristic is crucial for the survival of aquatic ecosystems.
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