The Nazi concentration camps were the places there the Jews (and others) were taken, to be gassed then burnt in ovens. Hitler exterminated over 4 million people in these camps.
The reason they were called concentration camps is because they were camps where the government concentrated (herded together) a particular group of people.
Well basically concentration camps can either be a place for work, or a place to gas or cremate people. If you were under 15 or 14 you would instantly be sent to the chambers to be gassed. The same...
A death camp, or extermination camp is one that was specifically designed for murdering. The six death camps were: Auschwitz-Birkenau Belzec Sobibor Treblinka Majdanek Chelmno A concentration camp...
In the concentration camps the Nazis generally just held you there, somewhat like a prison, possibly doing hard labor for an indefinite amount of time..