Understanding Adhesives and Stickiness

Which of the following is NOT an example of an adhesive mentioned in the video?

• Sticky notes

• White glue

• Metal screws

• Food labels

What is the primary difference between adhesion and cohesion?

• Adhesion is a chemical bond, while cohesion is a physical bond.

• Adhesion is the force between similar substances, while cohesion is between different substances.

• Adhesion is the force between different substances, while cohesion is between similar substances.

• Adhesion is temporary, while cohesion is permanent.

How does a water droplet demonstrate both adhesion and cohesion?

• By sticking to a surface and maintaining its shape

• By evaporating quickly

• By changing color

• By freezing into ice

What role does wetting play in the effectiveness of an adhesive?

• It allows the adhesive to flow into surface crevices.

• It prevents the adhesive from sticking.

• It makes the adhesive less sticky.

• It helps the adhesive dry faster.

Which animal uses its own adhesive to trap prey?

• Ants

• Spiders

• Mussels

• Bees