2, because a theory is not a law that can not be changed, and new evidence can change a theory.
Chemical energy is stored in the battery cells and converted to electrical energy when it's needed by the toy robot
Probably through a electron microscope either TEM or SEM. or possibly a picture through the microscope. I hope that helped.
The answer would be "a person's skin"
hope this helps :)
Rain falling to the ground. water runs downhill and flows toward the sea.
