Population and Species
Population
This picture shows many different people but are the same species. http://upload.wikimedia.org/wikipedia/commons/thumb/0/0d/22Jul09_eclipse_Varanasi.jpg/480px-22Jul09_eclipse_Varanasi.jpg
The picture above shows a population of humans. They all may be different in some ways but they are all the same species. This shows a population because they are not only the same species but they are also all in the same area.
Species
This piscture shows the species of giraffes. http://4.bp.blogspot.com/-tS_aQgxw6o4/Tc_e4GA8zsI/AAAAAAAAAB8/bbX19yKAnKc/s1600/giraffe.jpg
An example of a species are giraffes. there may be different types of giraffes all around the world but they are all still giraffes. Just like there are many different tyes of dogs, but they are all still dogs.