In this experiment, you compare several unknown powders to known powders. what is the name given to all of the known materials used for comparison in this experiment?

Write the overall equation for the reaction for lithium battery

Is laundry detergent an acid or a base?

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)