Aplant grows three inches in a month. why is this a physical change?

Because the chemical composition of the plant itself hasnt changed at all

This is a physical change, because a physical change is a change that happens on the outside. a chemical change changes the appearance of something permanently. only the plants appearance is changing. so it's physical.

heat or electricity in the atmosphere- c.

each  column  of the  table  is called a group. elements in a group share similar properties. groups are  read  from  top  to  bottom. metal. metalloid. nonmetal. solid. liquid. gas. fe. hg. o.  2. 3. 4. 5. 6. 7. 8. 9.  2. beryllium. 9.012. 4.  sodium. 22.990.  11. 3.  magnesium. 24.305.  12.  potassium. 39.098.  19. 4.  calcium. 40.078.  20. i guess  i