Weathering limestone - with my own breath!

Today's new ELI is 'Weathering limestone – with my own breath! - a classroom demonstration of how limestone is weathered'

This is a pupil activity, or a demonstration, involving blowing into neutral water to produce a weak carbonic acid. Powdered limestone is added to neutralise the acid, as a quick-acting laboratory example of how limestone is weathered by rain (a weak carbonic acid) in the natural world.
Lots of activities to do with weathering can be found in the list of 'Activities related to the new ELI' on our website.