Cohesion, Adhesion, Surface tension

Front

What is cohesion in the context of water molecules?

Back

Cohesion refers to the attraction between water molecules due to hydrogen bonding, causing them to stick together.

Front

What is adhesion in the context of water?

Back

Adhesion is the attraction between water molecules and other substances, allowing water to stick to surfaces.

Front

Define surface tension.

Back

Surface tension is the elastic-like force existing at the surface of a liquid, caused by the cohesive forces between liquid molecules.

Front

What is capillary action?

Back

Capillary action is the ability of water to flow in narrow spaces against gravity, due to the combined effects of cohesion and adhesion.

Front

How does cohesion contribute to surface tension?

Back

Cohesion causes water molecules at the surface to be pulled inward, creating a 'skin' that resists external force.

Front

Why is capillary action important for plants?

Back

Capillary action allows water to move from the roots to the leaves, which is essential for plant hydration and nutrient transport.

Front

What role does adhesion play in capillary action?

Back

Adhesion allows water to cling to the walls of a tube or plant vessels, helping it to rise against gravity.

Front

How does temperature affect surface tension?

Back

As temperature increases, surface tension typically decreases because the increased kinetic energy allows molecules to move apart more easily.

Front

What is the relationship between cohesion and water's high specific heat?

Back

Cohesion contributes to water's high specific heat by requiring more energy to break the hydrogen bonds between water molecules.

Front

Explain how surface tension affects small objects on water.

Back

Surface tension can support small objects, like a needle or a water strider, allowing them to float without sinking.