8/16 - Cohesion, Adhesion and Surface Tension

Front

What is cohesion?

Back

Cohesion is the attraction between water molecules, causing them to stick together.

Front

What is adhesion?

Back

Adhesion is the attraction between water molecules and other substances.

Front

What is surface tension?

Back

Surface tension is the property of the surface of a liquid that allows it to resist an external force, due to cohesive forces between liquid molecules.

Front

Why do water droplets take a spherical shape?

Back

Water droplets take a spherical shape because of cohesion, which pulls the water molecules together.

Front

What types of objects can be supported by surface tension in water?

Back

Small objects can be supported by surface tension in water.

Front

How does cohesion affect water movement in plants?

Back

Cohesion helps water molecules stick together, allowing them to move upward through plant vessels.

Front

What role does adhesion play in capillary action?

Back

Adhesion allows water molecules to stick to the walls of narrow tubes, helping them climb against gravity.

Front

Give an example of adhesion in everyday life.

Back

Water sticking to a leaf is an example of adhesion.

Front

What happens to a paperclip when placed gently on water?

Back

A paperclip can float on water due to surface tension.

Front

How does temperature affect surface tension?

Back

Higher temperatures generally decrease surface tension, while lower temperatures increase it.