The definition of atomic structure is the positively charged nucleus and the negatively charged electrons circling around it, within an atom.
A variable that is not being directly tested during an experiment should be independent
A physical change that may happen in a movie theater is:
You accidentally step on a piece of popcorn.
That piece of popcorn is still made up of the same things but LOOKS different. Therefore, the piece of popcorn went through a physical change.
I hope this helps!
A MOUNTAIN RANGE is a landform with high elevation and a more or less level surface
