The Canucks took an early lead when Tanzania defender Ester Masek inadvertently turned the ball into her own net.
Canada came out firing after the break, scoring twice within five minutes. Olivia Chisholm produced a stunning long-range strike that could contend for Goal of the Tournament before Annabelle Chukwu doubled the advantage from close range.
With 50 students from a local Canadian school in Katowice cheering them on, Chukwu added her second with a powerful finish.
Kaylee Hunter and Liana Tarasco completed the rout late on as Canada moved to four points and await confirmation of their knockout-stage qualification as one of the best third-placed teams.
