I just saw a field hockey game, it was interesting. do you know when it was created ?
I don't know the exact year but it does date back to the middle ages!! England, Scotland, France, and the Netherlands all played field hockey.
So it predates ice hockey ... and in which country  is it popular  ?
I'm not too sure. I'm in America and I've never seen a field hockey game and I don't know anyone who watches or plays it. Ice hockey is different though. I know that's popular in Canada, the US, Russia, Scandinavia, and Eastern Europe.
And do you know other differences between ice hockey and field hockey ?
Ice hockey
Ice hockey is a contact team sport played on ice, usually in a rink, in which two teams of skaters use their sticks to shoot a vulcanized rubber puck into their opponent's net to score points. The sport is known to be fast-paced and physical, with teams usually consisting of six players each: one goaltender, and five players who skate up and down the ice trying to take the puck and score a goal against the opposing team.
Ice hockey is most popular in Canada,
History of field hockey
Hockey is a popular game possibly depicted on walls in Egypt. Drawings of what looks to be hockey have been found in an Egyptian tomb that was 4000 years old. Hockey is a popular game in India and Pakistan. It was played for hundreds of years before other countries like England modernised it. Hockey is similar to an ancient game played in Scotland called shinty. Hockey is often played at schools in the UK but its origins are unclear. Later came ice hockey, which developed in Canada.