Final answer:
To correctly change a natural minor scale into a melodic minor scale, both the 6th and 7th scale degrees must be raised when ascending, making the statement false.
Step-by-step explanation:
The statement, "To change a natural minor scale into a melodic minor scale, you would just raise scale degree 7," is false. To create a melodic minor scale from a natural minor scale, one must raise both the 6th and 7th scale degrees when the scale is ascending, and then lower these notes back to their original pitches in the natural minor scale when descending.