Usually the number of protons matches the number of?

Using data from seismic waves, geologists have learned that earth’s interior is made up of several

Is a pencil falling to the floor anon contact force, a force, or a contact force

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)