Question

1. list 3 everyday examples of the cohesive and/or adhesive properties of water. cohesive adhesive

Explanation:

Cohesion refers to the attraction between water molecules. Adhesion is the attraction between water molecules and other substances.

• Cohesion examples:
• Water droplets forming spherical shapes on a surface. The cohesive forces between water molecules pull them together to minimize surface area.
• Water beading up on a waxed car hood. The strong cohesion within water keeps the molecules together rather than spreading out.
• Capillary action in plants (partly due to cohesion as water molecules pull each other up the xylem vessels).
• Adhesion examples:
• Water climbing up the sides of a glass tube (capillary action also involves adhesion as water adheres to the glass surface).
• Water spreading out on a clean glass surface. The adhesive forces between water and glass cause the spreading.
• Dew drops sticking to leaves. The adhesion between water and leaf surface keeps the dew drops in place.

Answer:

• Cohesion examples: Water droplets forming spheres, water beading on waxed car hood, capillary action in plants (due to cohesion aspect).
• Adhesion examples: Water climbing glass tube (adhesion part of capillary action), water spreading on clean glass, dew drops on leaves.