How can we accurately use the term evolution to describe what we see now over time?

Evolution describes the way species change over time.  A
species will pass on the more desirable traits to its young.  Over time, this process
will change the species and help it adapt to its changing environment.  A common example
is the white moth.  Over time, humans began to pollute the area the white moth lived
in.  Instead of white being a camouflaging color, it made the moth stand out against the
dingy gray of the city.  Moths that were darker in color survived while the pure white
moths were eaten or destroyed by predators.  Thus, the white moth became the gray moth. 
We could watch, over time, as the species began to change.  This type of evolution is
constantly occurring all around us.  Plants and animals adapt with each
generation.