In the lab, you took mass and volume measurements and plugged them into the density formula and calculated densities for different objects. how do you preserve the accuracy and precision of your measurements when doing calculations with the measurements?

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)