Science Chemistry Topics Flashcards

Which property of a material describes how well it transfers heat?

Answer: Thermal conductivity

Thermal conductivity describes how readily a material allows heat energy to pass through it — metals generally have high thermal conductivity.

Which of the following materials is the best conductor of electricity?

Answer: Copper

Copper is an excellent electrical conductor, which is why it is widely used in electrical wires and circuits.

What does it mean when a material is described as 'magnetic'?

Answer: It is attracted to a magnet

A magnetic material is one that is attracted to a magnet — examples include iron, steel, and nickel.

Which material is most suitable for making a waterproof raincoat?

Answer: Rubber

Rubber is waterproof and flexible, making it ideal for raincoats and waterproof gear that must keep water out.

A material that allows light to pass through it so that objects behind it can be seen clearly is called:

Answer: Transparent

Transparent materials such as clear glass allow light to pass through completely, making objects behind them clearly visible.

Why is rubber used as the coating on electrical wires?

Answer: Rubber is an insulator that prevents electric shocks

Rubber is an electrical insulator, so it prevents electricity from escaping the wire and protects users from electric shocks.

A material that does NOT allow any light to pass through it is described as:

Answer: Opaque

Opaque materials block all light from passing through — examples include wood, metal, and cardboard.