What is the difference between whole-chromosome aberrations and point mutations?

Both are types of mutation yet in a point change, one base combine is changed, and in a chromosomal deviation, a whole area of the chromosome is modified. 
A chromosome variation from the norm, issue, inconsistency, distortion, or change is a missing, additional, or unpredictable bit of chromosomal DNA. It can be from an atypical number of chromosomes or a basic anomaly in at least one chromosomes.

Iwould say overuse ( but not 100% sure ) in the u.s. we tend to overuse water by leaving it running, throwing it away, taking long showers, etc.