tall cylinder vacuum thermos flask with a cup-shaped screw lid Maze

About the tall cylinder vacuum thermos flask with a cup-shaped screw lid

A thermos is an insulated bottle that keeps drinks hot or cold for hours. It works with two containers, one inside the other, with the air removed from the gap between them so heat cannot cross easily. It was invented in 1892 by a scientist named James Dewar. Print this page for a science-theme activity, tracing the tall flask and its cup-shaped lid.

• A thermos slows heat by using a near-empty gap between two walls.
• It was invented in 1892 by James Dewar.

How to use this maze

• Start at the red flag and trace a path to the checkered flag — there is one correct route.
• Print on A4 or US Letter at 100% scale; the solution image above is the answer key.
• Free for classroom, homeschool, and personal printing.

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