Earth
View gives you a beautiful view of the Earth from above, showing day and night, at
your choice of time and date, and centering on any latitude and longitude. If you
play with this a little, you can get a very good idea of the patterns of day and night
over the Earth at different seasons. For more options, see the main page of this
great web site: Earth and Moon
Viewer.
Here
Comes the Sun is a good tutorial about earth-sun relations and seasons, with clear
diagrams and animations.
Guide
to Arctic Sunrise and Sunset lets you see where the sun is shining (or not) at three
different locations in the Arctic for your chosen month. Good for visualizing how
the seasons work at high latitudes. Also, you can get a calendar (printable)
of sunrise and sunset times for many locations in the world at Custom Sunrise Sunset
Calendar.
Magnetic Declination is a
very interesting page from the Geological Survey of Canada, explaining in some detail why
your compass needle does not really point to the North Pole. ("What do you mean
"North isn't North"?"). There is a short section on using a compass and
map. Also, if you know your latitude and longitude, the Geological Survey will provide you
with a magnetic
declination calculator for your location.
Coordinate
Systems Overview is a comprehensive page on coordinate systems and related topics,
including latitude and longitude, UTM, and MGRS, among others.
How
to Read Topographical Maps is a summary that covers the basics of reading USGS topo
maps: what information to look for, how contour lines work, several coordinate systems
(latitude/longitude, UTM, PLSS) that you might encounter on a topo map. This web
site from Arizona will also tell you how to find ghost towns.
Geography--The
National Map, from the US Geological Survey, has a tremendous amount of information on
maps of all types, imagery, educational materials...
A great Remote Sensing Tutorial from NASA,
covering topics from the history of remote sensing to a wide variety of applications, with
many images.
Computer Mapping Systems/GIS
for Teachers is the schedule for a web-based class on GIS from Emporia State
University in Kansas. There are links to web lectures on various topics in GIS and
Remote Sensing, some from the instructor, Dr. James Aber, and some from the National
Council for Geographic Information and Analysis (NCGIA). Many of the topics have fairly
complete lecture notes. Plenty of maps and images.
Here is the schedule for an entire online course in Remote Sensing, also
from Dr. Aber at Emporia State. The schedule links to lectures (complete, not just
outlines) on various topics, and again, there is access to a lot of imagery.
The Online Meteorology Guide,
from the University of Illinois, is an excellent introduction to weather. It has
discussions of air masses and fronts (with maps and diagrams), photos of clouds,
with a description of each type, information on winds, midlatitude cyclones, severe
storms, and much more.
A good page on Reading Weather Maps,
surface and upper air, from the University of Illinois.
My tutorial on Humidity
covers physical states of water, adiabatic processes, ways of expressing humidity, and
everyone's favorite, relative humidity.
Bad Coriolis talks about
misconceptions about the Coriolis Effect. Complete with photos of sinks
draining the wrong way.
Major Biomes of the
World is an excellent tutorial on biomes, from Dr. Susan Woodward, at Radford
University. It has descriptions, photos, a glossary, and study guides.
The
California Environment includes information resources on the geography and
environment of California, its natural history, natural hazards, and environmental issues.
Lab on Soil
Texture is a summary of basic information on soil texture, and a description of how to
analyze a soil for texture, put together for a class at the University of Minnesota.
Soil Texture
Slides show photos of various soil textures.
These well-illustrated Laboratory
Units from soils classes at the University of Minnesota cover several soils
topics, and would be a good introductory overview on soils.
How fast are you moving? Find out
with this Plate
Motion Calculator from the UNAVCO Facility, Boulder, Colorado.
Enter your latitude and longitude, and it will give you your rate of speed.
Here's an interesting website on How
Volcanoes Work, from Dr. Vic Camp at the SDSu Geology Department.
Lots of earthquake information, on this
page from the Earthquake Hazards
Program--Northern California of the USGS.
Natural Hazards in California
will lead you to a lot of information on natural hazards, including earthquakes,
volcanoes, and the tectonic processes that cause them.
also, take a look at the geomorphology and landforms
section below
The Hydrologic Cycle, from
Environment Canada, has a diagram of the hydrologic cycle, with definitions of many
pertinent terms, and other information on water.
Hydrology, Running
Water, Erosion, and Sediment Transport is an informative outline for a lecture on
streams; especially interesting are the photos of rivers, and the discussion of levees and
flooding. For further understanding of streams, here is a great on-line exercise
called Virtual River, which
will help you understand river processes, such as the relationship between a river's
discharge, on the one hand, and its velocity and the size of the channel, on the
other. Some other links to information about rivers and water,
are provided by About.com.
Deserts:
Geology and Resources, is an online textbook from the USGS, that covers desert
formation and features, aeolian processes, desertification, and other topics.
Tour
of Park Geology is maintained by the US National Park Service.
Discusses Mountain Building,
Glaciers,
Caves, Volcanoes, and many other aspects
of the geology of our National Parks. There are examples and great photos from each
Park.
Geomorphology
from Space is a remarkable book from NASA. It contains 237 plates, including Landsat
images and mosaics, of geomorphological features, such as tectonic landforms (the Great
Basin, the Appalachians, San Andreas Fault, the Canadian shield, among others), volcanic,
fluvial, coastal landforms, and many more, all with commentary explaining what can be seen
and its significance. You could learn a lot about geomorphology from this book.
Shorelines and
Coastal Processes is an outline for a class lecture on these topics. It give a
good overview of coastal processes, and has some good photos illustrating coastal erosion
and structures designed to slow erosion.
If you are interested in karst topography and related
topics, Karst Link is a pretty
comprehensive page of links to websites on karst worldwide. The origin of the term
"karst" was in Serbia and Montenegro, and this page on Karst
of Serbia and Montenegro is worth a visit; not
many photos, but lots of maps, a discussion on the geology of the region, and details on
the caves. For marvelous photos, The Virtual Cave is a beautiful
site, covering caves of all sort, including solution caves (formed in limestone), lava
tubes, sea caves, and erosion caves. Well worth a visit!
Learn all about glaciers and ice ages with this
series of web lectures on Ice
Age Environments. This is an entire online course, from Professor James S.
Aber, at Emporia State University in Kansas.
Many links to information about glaciers, from
About.com.
What is geography? The Association
of American Geographers defines geography, and discusses what geographers do.
Fundamentals
of Physical Geography is an online textbook for University and College students
studying introductory Physical Geography. Written by Professor Michael Pidwirny, at
Okanagan University College in Canada, it covers most of the range of physical geography,
from an introduction to systems through meteorology and climatology, biogeography, plate
tectonics and geomorphology. This could be a useful reference source for getting a
different approach to a topic you need to work on.
Here is the World Lecture Hall's
listing of web-based courses in Geography.
Some of the courses listed just have the course schedule, some have lecture notes (varying
in the amount of detail), some have images and other links. (This is not a
comprehensive listing: there are lots of other courses out there).
About.com's Physical Geography
and Hazards index has links to many sites on all aspects of Physical Geography on the
web.