Tuesday, September 17, 2013
Weathering: Plant Roots
Plants, specifically plant roots, are one source of weathering. Cracks in driveways and sidewalks often provide evidence of this, but it's simple to watch it take place within your classroom.
You'll need some Plaster of Paris*, seeds** and a small disposable cup or cupcake paper.
**I've mentioned it before, but dried beans (like you'd use to make soup or baked beans) will germinate. They're cheaper to buy in a large quantity than garden seeds and they can be found easily year-round.