QuestionAugust 24, 2025

17. Explaining Cohesion: 18. Give an example of cohesion that you might see out in nature: 19. Explain adhesion: 20. Give an example of adhesion that you might see out in nature: 21. Water molecules move from a plant's roots to its leaves. How? 22. Why don't some insects such as water striders sink? 23. Why doesn't ice sink?

17. Explaining Cohesion: 18. Give an example of cohesion that you might see out in nature: 19. Explain adhesion: 20. Give an example of adhesion that you might see out in nature: 21. Water molecules move from a plant's roots to its leaves. How? 22. Why don't some insects such as water striders sink? 23. Why doesn't ice sink?
17. Explaining Cohesion: 18. Give an example of cohesion that you might see out in nature: 19. Explain adhesion: 20. Give an example of adhesion that you might see out in nature: 21. Water molecules move from a plant's roots to its leaves. How? 22. Why don't some insects such as water striders sink? 23. Why doesn't ice sink?

Solution
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Answer

17. Cohesion is the attraction between like molecules. ### 18. Example: Water droplets on a leaf. ### 19. Adhesion is the attraction between unlike molecules. ### 20. Example: Water droplets on a spider web. ### 21. Water moves via capillary action (cohesion and adhesion). ### 22. Surface tension prevents water striders from sinking. ### 23. Ice is less dense than water, so it floats. Explanation 1. Define Cohesion Cohesion is the attraction between molecules of the same substance, such as water molecules sticking together due to hydrogen bonding. 2. Example of Cohesion in Nature Water droplets forming on a leaf or surface due to the cohesive forces between water molecules. 3. Define Adhesion Adhesion is the attraction between molecules of different substances, such as water molecules sticking to plant cell walls. 4. Example of Adhesion in Nature Water droplets adhering to a spider web or the surface of leaves. 5. Explain Water Movement in Plants Water moves from roots to leaves through capillary action, driven by cohesion and adhesion within the xylem vessels. 6. Explain Why Water Striders Don't Sink Water striders don't sink due to surface tension, which is caused by cohesive forces creating a "skin" on the water's surface. 7. Explain Why Ice Doesn't Sink Ice doesn't sink because it is less dense than liquid water; its molecular structure forms a lattice that occupies more space.

Explanation

1. Define Cohesion<br /> Cohesion is the attraction between molecules of the same substance, such as water molecules sticking together due to hydrogen bonding.<br /><br />2. Example of Cohesion in Nature<br /> Water droplets forming on a leaf or surface due to the cohesive forces between water molecules.<br /><br />3. Define Adhesion<br /> Adhesion is the attraction between molecules of different substances, such as water molecules sticking to plant cell walls.<br /><br />4. Example of Adhesion in Nature<br /> Water droplets adhering to a spider web or the surface of leaves.<br /><br />5. Explain Water Movement in Plants<br /> Water moves from roots to leaves through capillary action, driven by cohesion and adhesion within the xylem vessels.<br /><br />6. Explain Why Water Striders Don't Sink<br /> Water striders don't sink due to surface tension, which is caused by cohesive forces creating a "skin" on the water's surface.<br /><br />7. Explain Why Ice Doesn't Sink<br /> Ice doesn't sink because it is less dense than liquid water; its molecular structure forms a lattice that occupies more space.
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