I’m really confused can some one please help me

The difference between the atomic number of an element and the element’s atomic mass is the number of ions.

Scientific evidence tells us that the cause of earths four season is the tilt of earth as it revolves around the sun. the student is instructed to illustrate this information in a science notebook. how will the student illiterate winter in the northern hemisphere?

  the mississippians were considered to be  horticulturalists, which means they were