Material Elasticity Quiz

What does Young's modulus measure?

• Strength of a material

• Stiffness of a material

• Flexibility of a material

• Density of a material

What does the strength of a material refer to?

• Ability to stretch without breaking

• Maximum stress before breaking

• Ability to return to original shape

• Ability to resist deformation

What happens to wet hair and silk thread when stretched?

• They become harder to stretch

• They break easily

• They lose all elasticity

• They become easier to stretch

What effect does hydration have on the elasticity of hair?

• Decreases flexibility

• Increases stiffness

• Reduces stiffness

• No effect on elasticity

Why does a cold rubber band become harder to stretch?

• Intermolecular forces weaken

• Polymer chains lose rigidity

• Decreased elasticity

• Increased flexibility

What is the effect of cold temperature on the elasticity of a rubber band?

• Increases elasticity

• Decreases rigidity

• Decreases elasticity

• Increases flexibility

What happens to wet hair and silk thread if overstretched while wet?

• They become more elastic

• They may not return fully to original shape

• They return to original shape easily

• They become stiffer

How does hydration affect the structural integrity of wet hair?

• Makes it more flexible

• No effect on integrity

• Weakens it

• Strengthens it

What happens to the rubber band when warmed back to room temperature after being cold?

• It loses all elasticity

• It remains stiff

• It becomes more elastic

• It regains its original elasticity

What is the reversible effect of cooling a rubber band?

• Decreased stiffness

• Decreased elasticity

• Increased flexibility

• Increased rigidity