Some magnesium powder was mixed with some copper (ii) oxide and heated strongly . There was a vigorous reaction , producing a lot of sparks and a bright flash of light. A) state the name of products of the reaction

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)