taylorwa at UWEC.EDU (Wilson A Taylor, Dr. Wilson Taylor) wrote:
Had a thought. how about a practical that just requires your van a
ruler and graph
How about lichen growth on local grave stones the students could plot
the diameter of lichen against the age (taken from the dates on the
stones and calculate a growth rate
Maybe try sites near roads and big towns against countryside :
pollution etc.
I've got the prac. details if you want them
Andy Dyson
andy at biology.demon.co.uk