What's an example of a task that requires knowledge of physical objects to perform?
Start a fire using a magnifying glass.

What's an example of a task that requires knowledge of physical objects to perform?
How to use a rock as an anchor?

What's an example of a task that requires knowledge of physical objects to perform?
To help the cinnamon bread dough rise

What's an example of a task that requires knowledge of physical objects to perform?
Make cookies without oven.