Stone walls can be approached from any of the classic fields of science.  For an activity, you might take a group of students to a wall and ask them these questions:

• Physics:  Why do walls stand up so quietly? Answer: Force balance, friction, and mass.
• Chemistry:  Why do the stones of walls look different on weathered surfaces? Answer: dissolution from naturally acid rain and organic contributions, particularly microbial films.
• Ecology:  What lives in stone walls? Answer: chipmunks, amphibians, snakes and some say “trolls.” The plants are very different too.
• Geology:  Where did the stones come from? Answer: glaciation and ancient mountain building.

If this is an indoor activity, use one of the photos on this website.

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