Different fields of science use the term matter in different, and sometimes incompatible, ways. Some of these ways are based on loose historical meanings, from a time when there was no reason to distinguish mass and matter. As such, there is no single universally agreed scientific meaning of the word "matter". Scientifically, the term "mass" is well-defined, but "matter" is not. Sometimes in the field of physics "matter" is simply equated with particles that exhibit rest mass (i.e., that cannot travel at the speed of light), such as quarks and leptons. However, in both physics and chemistry, matter exhibits both wave-like and particle-like properties, the so-called wave–particle duality. COUNT 5
QSN1 What term does science not have a universally-accepted scientific definition for? ANS1 matter QSN2 Sometimes scientific terms were historically considered in ways we know now aren't compatible because scientists didn't need to distinguish matter from what other term? ANS2 mass QSN3 What word do physicists sometimes consider to be defined as particles exhibiting rest mass? ANS3 matter QSN4 What duality describes the conflicting properties of matter in the fields of chemistry and physics? ANS4 wave–particle duality QSN5 Quarks and leptons are sometimes considered matter because they can't travel at what speed? ANS5 the speed of light