Does playing games on the iPhone take up data usage?

[Kelsey]

I just got an iPhone 4, and I was wondering if playing games such as 4 Pics 1 Word, Wordsearch, Mahjong, or Chess would take up data? I'm connected to my wifi, if that's important. I only have 2GB a month, and I can't afford to go over. Thanks.
My carrier is Verizon.

[Bob]

I would just turn off your internet and use your wifi while at home. That way you know for sure you are not using up all your data when you do not want to.

[Hairy Pig]

If you're connected to wifi, you're not using data.