Carli Lloyd, Angela Hucles and Abby Wambach added goals for the Americans, an Olympic favorite along with Norway, Brazil and Germany. The United States improved to 19-0 this year, including a penalty-kicks victory over Canada.

"It's hard to play against us," U.S. coach Pia Sundhage said. "You can keep up for 45 minutes, but after a while, because you have to run so much and stay so focused in defending, at the end of the day, so many times we look stronger at the end of the game."

The Americans head to Sweden for another exhibition on Saturday in Skelleftea. The United States then plays Brazil on July 13 at Commerce City, Colo., and July 16 at San Diego.

Tarpley scored just four minutes in, capitalizing on Norway's sleepy defense.

Lloyd made it 2-0 in the 52nd minute, Hucles scored from 40 meters in the 84th and Wambach added another goal 3 minutes later - her 99th goal in 124 international appearances.

The United Sates has outscored Norway 12-1 in their last three matchups.

Two weeks ago, the Americans won the Peace Queen Cup in South Korea for their fourth tournament victory of the year.

Earlier this year, the Americans beat China in January to win the Four Nations Tournament, defeated Denmark for the Algarve Cup in March and downed Canada on penalty kicks in the final of CONCACAF women's Olympic qualifying tournament in April.