What defines a modern material?

• Naturally occurring with traditional properties

• Used only in construction

• Engineered to have improved properties

• Always a type of smart material

What is a key characteristic of smart materials?

• They are always opaque

• They are always transparent

• They are naturally occurring

• They change in response to external stimuli

What is a shape-memory alloy (SMA)?

• A naturally occurring mineral

• A type of plastic that changes color

• A metal that remembers its shape when heated

• A metal that expands when cooled

What is nickel titanium (nitinol) known for?

• Contracting when heated

• Expanding when heated

• Being a type of glass

• Being a type of wood

What are nanomaterials typically used for?

• Creating thin films or coatings

• Producing textiles

• Making traditional paper

• Building large structures

What do photochromic pigments do?

• Conduct electricity

• Remain the same under all conditions

• Change properties when exposed to UV light

• Change color in response to temperature

What is a common application of reactive glass?

• Wooden furniture

• Building foundations

• Privacy glass and auto-dimming mirrors

• Traditional window panes

What is a piezoelectric material capable of?

• Conducting heat

• Absorbing water

• Changing color when heated

• Generating electricity when pressure is applied

What is a unique feature of conductive inks?

• They are made from plastic

• They can conduct electricity when dry

• They are non-conductive

• They are used for painting

What do temperature-responsive polymers do?

• Change color in response to light

• Respond to temperature change by altering properties

• Remain solid at all temperatures

• Conduct electricity