Given a scientific question, generate a correct answer to it.

[Q]: What equals the mass of the object (in kilograms) times the acceleration due to gravity (9.8 m/s 2 )?
[A]: weight

[Q]: The fossilized skeleton of archaeopteryx looks like that of a dinosaur, but it had what structures modified for flight, a trait associated only with birds among modern animals?
[A]: feathers

[Q]: Which property changes when a glass breaks?
[A]:
its physical property