The Scots endured a heavy 5-1 loss in Florida the last time the sides met in May 2012, when Craig Levein was still at the helm.
He said: "It's a difficult place to go and play and we got beat.
"We took it on the chin. We looked at the performance and it wasn't good enough and we moved on.
"Our performances have picked up since then.
"They will be coming to Hampden and it will be a difficult game for them."
Scotland - who also travel to Norway for a friendly next week - have seen their fortunes transformed in recent games.
And Adam is relishing the prospect of keeping the momentum going with positive results from this double-header.
The Stoke midfielder said: "It's going to be a good test.
"The USA have qualified for the World Cup in Brazil and they have a good squad.
"It will be a tough test for us but we are on a good run at the moment ourselves and hopefully with home advantage we can make it count.
"We've made big steps. We beat Croatia home and away and they are a top side.
"We've done well in the last few games so it would be nice to take it on again.
"It's two tough fixtures this month but we look forward to them because when you are on a good run you enjoy it and you want to play.
"Hopefully we will give a good account of ourselves and try to win the game."
- Sports & Recreation
- Craig Levein
- Gordon Strachan