Global warming is the increase of the average temperature on the earth with causes melting of glaciers and lots of natural disasters such as strong winds, strong storms in areas where this wasn't usual a few decades ago. Also the disappearance of the season "winter", which gets warmer and warmer with an absence of snow and frost.
Climate change on the other hand is a phenomena, which has already occurred in the history of the earth, for example the change of the Boulder period to a warm interval, which we live in now. It's usually a normal process caused by natural evolution. But this climate change is mainly caused by humans and is a danger to the health of the earth and the existence to many species. Also is this climate change evolving faster than any other climate changes in the past, due to human interference.