Which quantity does a light-year measure?

A) distance
B) speed
C) time
D) volume

Which is a character of nuclear fusion but not nuclear fission

2points what is the job of a scientist? a. to answer ethical questions. b. to write laws based on his or her knowledge. c. to ask and answer scientific questions. d. to ignore facts that do not support his or her theory.

Long term exposure to waves can cause sunburns and skin cancer. a) visible b) infrared c) gamma rays d) ultraviole