Well i just had a major PTSD attack how is everyone i need to think about something else

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)

One similarity and one difference between an element and a mixture of elements

Name 3 types of energy you see being used as you look around a classroom