Which statement describes the charge of an
electron and the charge of a proton?
(1) an electron and a proton both have a charge of 1.
(2) an electron and a proton both have a charge of 1.
(3) an electron has a charge of 1, and a proton has a charge of 1.
(4) an electron has a charge of 1, and a proton has a charge of 1.

Observation and experimentation have led many scientists to accept a theory about the origin of the universe. this theory is called the big bang theory. scientific evidence collected and observed by scientists around the world suggests that the universe is ever expanding from a hot and dense initial state. what makes this a scientific theory? (2 points)