19. California Deserts
    There are about 25 million acres of desert in California and Southern Nevada. That's a lot of territory filled with all kinds of things to see and do..
    http: //californiadesert.gov/Trip/Header/index....
    
    
20. Saguaro cactus
    The Saguaro cactus can grow to enormous heights
    http: //web.bio.ed.ac.uk/research/groups/jdeacon/de...
    
    
21. North American Deserts webquest
    
    http: //wapiti.pvs.k12.nm.us/~Computer/deserts.htm
    
    
22. Desert Field Trip
    Virtual field trips on nature topics take students to some of the best web sites on each subject. Our format makes learning fun, and makes using the Internet simple, efficient and focused. Also includes TourMaker info and teacher's resources.
    http: //field-trips.org/sci/desert/tr.htm
    
    
23. The World's Biomes: Deserts
    Deserts cover about one fifth of the earth's surface.
    http: //ucmp.berkeley.edu/exhibits/biomes/deser...
    
    

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