8/16 - Cohesion, Adhesion and Surface Tension

Front

What is cohesion?

Back

Cohesion is the property of water molecules sticking to each other due to hydrogen bonding.

Front

What is adhesion?

Back

Adhesion is the property of water molecules sticking to other substances.

Front

What is surface tension?

Back

Surface tension is the elastic tendency of a fluid surface that makes it acquire the least surface area possible.

Front

What is the chemical formula for water?

Back

H₂O

Front

What is capillary action?

Back

Capillary action is the ability of water to flow in narrow spaces without the assistance of external forces, often due to adhesion and cohesion.

Front

How does temperature affect surface tension?

Back

As temperature increases, surface tension decreases because the molecules have more energy and move apart.

Front

What is polarity in water?

Back

Polarity refers to the distribution of electrical charge over the atoms joined by the bond, making water molecules have a positive and a negative end.

Front

Give an example of adhesion in everyday life.

Back

Water sticking to the surface of a leaf is an example of adhesion.

Front

Give an example of cohesion in everyday life.

Back

Water droplets forming on a smooth surface are an example of cohesion.

Front

What role does cohesion play in water transport in plants?

Back

Cohesion helps in the transport of water from roots to leaves through the xylem.