<ul><li>acids in rainwater </li></ul>This photograph shows a small section of masonry from a church in northern France. The rock was originally a smooth pillar like structure forming part of the outside decoration of the building. Over the last hundred years or so, acidic rain water has constantly dripped onto the rock from a rain gutter several meters above it.
Weathering Walk <ul><li>Find 3 places where weathering has occurred </li></ul>chemical Rusty AC chemical Rust Bench Physical Incline Trench in pit Physical Tree roots-cracking sidewalk Tree-sidewalk sidewalk physical or chemical appearance location
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