Teacher Notes On Soil Crust Identification
Stuck to the ground (appressed)
A possibility is to ask the students before you give them these notes, what they believe the functions are of each of the things that they have drawn. What is the advantage of turning tiny and black? What are those little black dots? What could they be used for? Why are they so dark when dry and green when wet? What are those little tiny black lines used for? See if they have ideas for this. This is very insightful.
Conrad, H.S., Redfearn, P.L.(1979) How to Know the Mosses and Liverworts Wm. C Brown Company Publishers, Dubuque, Iowa
Hale, M.E. (1979) How to Know the Lichens Wm. C Brown Company Publishers, Dubuque, Iowa
Hale, M.E. and Cole, M. (1988) Lichen of California University of California Press, Berkeley.
Nash, T.H. III (1996) Lichen Biology Cambridge University Press, Cambridge
Ruef, K. (1992) The Private Eye The Private Eye Project, Seattle.
Objective:To be able to correctly distinguish between the major soil crusts of the desert.
Place the petri dish on the ground and make your observations while standing
up. Sketch the contents of the petri dish.(5pts)
Write down 4 observations of the whole dish. (1pt each)
Using some kind of magnification (loupe or stereoscope), draw with great detail each of the contents. Write 4 observations (1 pt each)