Multiple Choice
Which of the following best explains how the cohesive and adhesive properties of water help sustain life on Earth?
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3. Water
Properties of Water- Cohesion and Adhesion
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Which of the following effects can occur because of the high surface tension of water?
A
Lakes cannot freeze solid in winter even with extremely low temperatures.
B
A spider can walk across the surface of a small pond.
C
Oganisms can resist temperature changes, although they give off heat due to chemical reactions.
D
Sweat can evaporate from the skin, helping to keep people from overheating.
Verified step by step guidance1
Understand the concept of surface tension: Surface tension is a property of the surface of a liquid that allows it to resist an external force, due to the cohesive nature of its molecules.
Identify the role of hydrogen bonds: In water, hydrogen bonds between molecules create a 'film' at the surface, which is responsible for its high surface tension.
Consider the options given: Evaluate each option to determine which one is directly related to the ability of water to resist external forces due to surface tension.
Analyze the option about a spider walking on water: This scenario is a classic example of surface tension, where the cohesive forces at the water's surface are strong enough to support the weight of small insects like spiders.
Conclude that the high surface tension of water allows small organisms, such as spiders, to walk on water without breaking the surface.
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