Mind the Gap: Observing Nature's Cracks and Crevices
Survey your local habitat for cracks and crevices. You
What makes cracks?
What takes advantage of cracks?
What gets trapped in cracks?
What uses cracks for underground access?
Does a particular crack get longer or wider over time?
What do you think causes a crack to change direction?
Does one side of a crack in the sidewalk go up while the other side goes down?
What happens to cracks underground?
Do worms make cracks in the soil when they make their burrows?