Intermolecular Forces

Question 1

What part of the underside of a gecko’s feet allows it to stick to surfaces?

Revolt · Accepted Answer

pillars

Question 2

What type of intermolecular force tightly attracts the gecko’s feet to the surface it walks on?

Revolt · Accepted Answer

Van der Waals forces

Question 3

In the article, “As Sticky as a Gecko . . . but Ten Times Stronger!,” scientists applied knowledge of gecko feet to produce an adhesive. How did scientists explain this application of knowledge? Check all that apply.

Revolt · Accepted Answer

The adhesive is made up of two different layers.; The lower layer is made up of vertically aligned nanotubes.; The upper layer is made up of curly, spaghetti-like, nanotubes.

Question 4

As stated in the article, “As Sticky as a Gecko . . . but Ten Times Stronger!,” the adhesive the researchers developed sticks best when it is pulled down parallel to the surface. What type of adhesion is this called?

Revolt · Accepted Answer

shear adhesion

Question 5