Gecko Feet

Which elements are highly electronegative?

• Oxygen

• Hydrogen

• Lithium

• Fluorine

Which elements are highly electronegative?

• Oxygen

• Hydrogen

• Lithium

• Fluorine

An atom's electronegativity is its _____.

• Van der Waals radius

• Affinity for electrons

• Negative charge

• Ability to attract water molecules

In a molecule where one atom is more electronegative than the other, the electrons will tend to be _____.

• Evenly distributed

• Farthest away from the more electronegative atom

• Closer to the more electronegative atom

• There's no way to know--they move randomly

How do the setae and spatulae help the gecko stick?

• Their shape increases the coefficient of friction

• Their branched structure hooks onto the surface like Velcro

• They contain charged particles

• They increase the surface area of the gecko's foot

A gecko can disengage its stickiness by _____

• Stepping in water

• Changing the angle of the spatulae

• Placing its foot on a conductive surface

• Secreting a slippery substance