Which of the following scenarios is an example of cohesion?Choose 1 answer:Choose 1 answer:(Choice A) Water molecules stay on the tip of a pine needle because the water is attracted to the surface of the needle.AWater molecules stay on the tip of a pine needle because the water is attracted to the surface of the needle.(Choice B) Water molecules stick to the surface of a mirror.BWater molecules stick to the surface of a mirror.(Choice C) Water molecules stick to one another and form a bead.CWater molecules stick to one another and form a bead.(Choice D) Water sticks to the walls of blood vessels.DWater sticks to the walls of blood vessels.
Question
Which of the following scenarios is an example of cohesion?Choose 1 answer:Choose 1 answer:(Choice A) Water molecules stay on the tip of a pine needle because the water is attracted to the surface of the needle.AWater molecules stay on the tip of a pine needle because the water is attracted to the surface of the needle.(Choice B) Water molecules stick to the surface of a mirror.BWater molecules stick to the surface of a mirror.(Choice C) Water molecules stick to one another and form a bead.CWater molecules stick to one another and form a bead.(Choice D) Water sticks to the walls of blood vessels.DWater sticks to the walls of blood vessels.
Solution
The correct answer is (Choice C) Water molecules stick to one another and form a bead. This is an example of cohesion, which is the property of like molecules (from the same substance) to stick to each other due to mutual attraction. In this case, water molecules are sticking to each other to form a bead.
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