Cohesion and Adhesion in Water

The video tutorial discusses the properties of cohesion and adhesion using water as an example. Cohesion is explained through the ability of insects to walk on water due to surface tension created by hydrogen bonds between water molecules. Adhesion is demonstrated by how water clings to the sides of a glass, illustrating the attraction between water molecules and other materials.

What are the two properties discussed in the video?

• Cohesion and Adhesion

• Evaporation and Condensation

• Sublimation and Deposition

• Diffusion and Osmosis

Why can insects walk on the surface of a pond?

• Because of adhesion

• Due to surface tension from cohesion

• Because they are lightweight

• Due to the pond's temperature

What causes water molecules to attract each other?

• Hydrogen bonds

• Gravitational pull

• Electrostatic forces

• Magnetic forces

What is the charge of the oxygen part in a water molecule?

• Negative

• Positive

• Neutral

• Variable

What is adhesion?

• Water molecules evaporating

• Water molecules sticking to other substances

• Water molecules freezing

• Water molecules sticking to each other

What shape does water form when it adheres to the side of a glass?

• A straight line

• A square

• A U shape

• A circle

In the context of adhesion, what materials do water molecules cling to?

• Materials like glass or plastic

• Only metals

• Only organic materials

• Only other water molecules

What property allows water to cling to the sides of a glass?

• Cohesion

• Adhesion

• Evaporation

• Condensation

Which of the following is NOT a result of cohesion?

• Surface tension

• Insects walking on water

• Water forming droplets

• Water clinging to glass

What is the main difference between cohesion and adhesion?

• Cohesion involves different substances, adhesion involves the same substance

• Cohesion involves the same substance, adhesion involves different substances

• Cohesion is a physical reaction, adhesion is a chemical reaction

• Cohesion is a chemical reaction, adhesion is a physical reaction