Question

determine whether each statement is true or false. a water droplets shape is due to surface tension. hydrogen bonds at the waters surface allow a water strider to walk on water. cohesion causes water molecules on the surface to push apart. surface tension forms on lakes and ponds.

Explanation:

• A water droplet's shape is due to surface tension: Surface tension minimizes the surface area of water, making droplets spherical (the shape with the least surface area for a given volume).
• Hydrogen bonds at the water's surface allow a water strider to walk on water: Hydrogen bonds create surface tension. The water strider's legs distribute its weight, and the surface tension (from hydrogen - bonded water molecules) supports it.
• Cohesion causes water molecules on the surface to push apart: Cohesion is the attraction between water molecules. At the surface, cohesion (not pushing apart) creates surface tension. Molecules are pulled inward, not pushed apart.
• Surface tension forms on lakes and ponds: Surface tension is a property of liquid surfaces. Lakes and ponds have water surfaces, so surface tension forms there.

Answer:

• A water droplet's shape is due to surface tension: True
• Hydrogen bonds at the water's surface allow a water strider to walk on water: True
• Cohesion causes water molecules on the surface to push apart: False
• Surface tension forms on lakes and ponds: True