객관식
Which of the following can cause an increase in the density of ocean water?
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3. Water
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 more dense than their liquid counterparts 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 is less dense than liquid water.
Consider the implications for aquatic life: Because ice is less dense, it floats on the surface of water. This creates an insulating layer that helps to maintain a relatively stable temperature in the water below, allowing aquatic life to survive in cold climates.
Analyze the ecological significance: The floating ice layer prevents entire bodies of water from freezing solid, which would be detrimental to aquatic ecosystems. This allows organisms to continue living and functioning beneath the ice.
Conclude the importance for life: The ability of ice to float is crucial for the survival of many aquatic species during winter months, as it preserves the liquid habitat necessary for their survival.
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