Canada beat Norway 4-1 on Thursday for its fourth straight World Ice Hockey Championship win after allowing no shots on goal in the first two periods.
The United States scored four goals in the first half to beat France 5-0, while Sweden maintained its perfect record by defeating Kazakhstan and Austria, which surprised Finland.
In Group A in Prague, Canada took a two-goal lead after Brandon Tanev scored in the first period from close range and Andrew Mangiapane doubled the lead in the second.
Norway didn't get their first shot on target until early in the third period, but scored their second when Styan Solberg made it 2-1.
Dylan Cousins extended the lead to 3-1 with a short unassisted goal and Jared McCann added a fourth into an empty net, with Dawes providing the assist.
Canada meets Finland on Saturday.
In Group B in Ostrava, Matt Boldy scored twice and added an assist for the Americans against France. Brock Nelson had a goal and two assists, Johnny Gaudreau added a goal and an assist and Shane Pinto also scored.
The opening period was dominated by the first line of Boldy, Gaudreau and Nelson.
Nelson opened the scoring from the slot 45 seconds into the game and Boldy scored two one-timers before Gaudreau added the fourth from the right circle.
Pinto completed the scoring with 2:08 left in the final period and goalie Alex Nedeljkovic stopped 10 shots at the end of the first period.
This is the second win for the Americans, who played Poland on Friday.
Earlier, Sweden beat Kazakhstan 3-1. Linus Johansson, Marcus Johansson and Fabian Zetterlund scored a goal as the Swedish team achieved its fourth victory to lead Group B in Ostrava.
Adil Bektaev scored for Kazakhstan.
In Group A in Prague, Austria stunned Finland 3-2 for its first win of the tournament and first over Finland in a World Championship. Benjamin Baumgartner scored the winning goal with one second left to rally from a two-goal deficit.
Oliver Kapanen scored his tournament-leading sixth goal, and Sakko Minalainen also scored to give Finland a 2-0 lead.
Mario Huber started the lead and Themo Nickel equalized midway through the final period for Austria, who took Canada to overtime in their final game before losing 7-6.
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