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500-599 - Pure Sciences

500 - Philosophy & Theory
510 - Math
520 - Astronomy
530 - Physics
540 - Chemistry
550 - Earth Sciences
560 - Paleontology
570 - Biology
580 - Plants
590 - Animals
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The Dewey Decimal Classification is (c) 1996-2001 OCLC Online Computer Library Center, Incorporated. DDC, Dewey, and Dewey Decimal Classification are registered trademarks of OCLC Online Computer Library Center, Incorporated.

500
Philosophy and Theory

Ask the Experts

Why does bruised fruit turn brown? Why is the year 2000 not the first year of the third millennium? Get the answer to these and other scientific questions from the Ask the Expert Archive of Scientific American magazine online. Browse the various science sections, or send your question to be answered by experts. (www.sciam.com/askexpert_directory.cfm)

Dr. Shawn's Super Science Fair Project Support Center

This site, formerly known as SciFair.org, has everything for students looking for science fair project ideas. Get help with setting up a project, building a display, and writing the report. (www.scifair.org)

Science Buddies

Take a survey on this site to help you get ideas for the right science project for you, then follow detailed guidelines for setting up hundreds of projects. If your project needs help, consult the Ask an Expert link for answers from volunteer science professionals. (www.sciencebuddies.org)

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510
Mathematics

Math2.org

Here is a great mathematical resource in English and Spanish, with theorems, identities, tables, graphs and formulas, as well as a mathematical dictionary, available here. Go to the Math Message Board for answers to your math questions. (www.math2.org/)

Math.com: The World of Math Online

In addition to a basic and a scientific online calculator, this site also has links for calculating other mathematical operations. (www.math.com/students/calculators/calculators.html)

GCalc: Free Online Graphing Calculator

A talented (and generous!) student of mathematics has programmed this free online graphing calculator. (gcalc.net)

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520
Astronomy

Astronomy.com

From Astronomy  magazine, this site offers astronomy news, sky events, weather information for stargazing, astronomy equipment guides, and a comprehensive assortment of related links. (www.astronomy.com)

Space Calendar

A great Web page from NASA that covers space-related activities and anniversaries for the coming year. (www2.jpl.nasa.gov/calendar/)

Moon Phase Calendar

This site from StarDate Online has an illustrated chart that shows the moon's illumination on each day of the calendar for the years 1951 to 2015. (www.stardate.org/nightsky/moon/)

The Nine Planets: A Multimedia Tour of the Solar System

An excellent site for information on astronomy: planets and moons, spacecraft, astronomical names, a glossary of technical terms and proper names, and a chronology of space discovery. (www.nineplanets.org/)

North American Skies

See a sky chart (updated monthly) of the stars and planets in the night sky as viewed from North America in mid-month. Times noted are Mountain Time. (home.comcast.net/~sternmann/index.htm)

Planetaria

Locate a planetarium to visit in cities around the world. (www.astrosociety.org/resources/linkplanetaria.html)

The World Clock

See the current time at locations all over the world, a planning guide for setting up meetings with people in different time zones, and many other nifty time calculator links. (www.timeanddate.com/worldclock/full.html)

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530
Physics

Online Conversion

Thousands of different unit converters are organized here by type: temperature, length, cooking, volume, speed, power, etc. Find equivalent measurements for anything you can think of! (www.onlineconversion.com)

How Many?: A Dictonary of Units of Measurements

Get definitions and conversion factors for the English Customary System used in the U.S., the metric system, and the International System of Weights and Measures (SIPM). (www.unc.edu/~rowlett/units)

The Physics Classroom

Tutorials for high school students on 11 basic physics concepts are supplemented by multimedia animations and practice exercises. From the staff at Glenbrook South High School in neighboring Glenview, Illinois! (gbs.glenbrook.k12.il.us/Academics/gbssci/phys/Class/BBoard.html)

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540
Chemistry

General Chemistry Online

Resources and guides for students, including tutorials and quizzes. (antoine.frostburg.edu/chem/senese/101/index.shtml)

Chemicool

Based on an image map of the Periodic Table, this Website gives you everything you've ever wanted to know about the elements, whether they're gases, solids, liquids, or alkali earth metals (or "other"). (wild-turkey.mit.edu/Chemicool/)

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550
Earth Sciences

Volcano World

This site from the Oregon State University has links to volcano activity throughout the world, specific volcanoes and volcanic parks. Search by world region, country, or volcano name. (volcano.oregonstate.edu/)

Earthquake Hazards Program

From the U.S. Geological Survey, this site provides current, historic, and predicted information on earthquakes around the globe - and it's user-friendly! (earthquake.usgs.gov)

WeatherNet

A comprehensive source of weather information - forecasts, current conditions, color satellite photos, and radar images nationwide. (cirrus.sprl.umich.edu/wxnet/)

Weather Safety

Links to safety procedures and precautions for heat waves, lightning strikes, hurricanes, tornadoes,thunderstorms, rip currents, floods, severe winter weather, and sun exposure - from the National Oceanic and Atmospheric Administration (NOAA). (weather.gov/safety.php)

Cloud Boutique

Learn to identify the different types of clouds with descriptions and photos. (vortex.plymouth.edu/clouds.html)

U.S. Geological Survey

General information and educational resources in geology, mapping, and water resources. (www.usgs.gov/)

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560
Paleontology

Dino Directory

View the descriptions of over 300 well-known dinosaurs as you search by scientific name, body shape, geographic location or time period. You can also see which dinosaurs were "Living Together" in the same area and time. (internt.nhm.ac.uk/jdsml/nature-online/dino-directory/)

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570
Biology

eNature.com

This site provides access to online field guides from the National Audubon Society covering more than 5,000 species of plants and animals. View a picture along with the description of each species. (www.enature.com)

Biology Online

Everything about the study of biology online can be found in this site's four main sections: Biology Forum, Dictionary of Biology, Biology Tutorials, Biology on the Web. (www.biology-online.org)

NCBI Taxonomy Browser

Find the complete scientific classification of any biological species by its common name or scientific name. Use plural words for common names - "butterflies", not "butterfly". (www.ncbi.nlm.nih.gov/Taxonomy/tax.html)

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580
Plants

Plants Database

This database of every plant in the United States and its territories is searchable by common name. Information for each plant includes a profile with photograph, the complete plant classification, and a map of the plant's geographical distribution. (plants.usda.gov)

Botany: Plant Parts and Functions

A useful illustrated guide to basic botany for students. (ag.arizona.edu/pubs/garden/mg/botany/plantparts.html)

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590
Zoology

Endangered Species

American and international lists of endangered and extinct species, laws, treaties, facts, full-text articles, and news on the topic. (eelink.net/EndSpp/)

Butterflies and Moths of North America

See which butterflies inhabit any of the areas on the searchable map of the U.S., northern Mexico, and Canada. For each location, you can view photos and learn about each butterfly species. See if you recognize any of the Illinois butterflies! (www.butterfliesandmoths.org)

All About Birds

Cornell University provides this site for bird lovers across North America. To view a video of a bird species or hear a recording of a bird's calls and songs, use the Bird Guide to choose a bird from the Taxonomic Order list or from the Alphabetical List of English names . (www.birds.cornell.edu/AllAboutBirds/)

Bird Checklists of the United States

Designed to help birdwatchers across the country, this site provides bird checklists indicating the seasonal occurrence of birds in national parks, wildlife nature preserves, and other areas. Illinois enthusiasts will find local information, too. (www.npwrc.usgs.gov/resource/birds/chekbird/index.htm)

Animal Omnibus

A very large collection of links for animals under eight major animal groups, including dinosaurs. Elephants alone have over 40 links! (www.animalomnibus.com/)

Lincoln Park Zoo

Get up close and personal with your favorite animals at Chicago's own Lincoln Park Zoo. (www.lpzoo.com)

Brookfield Zoo

Lots of useful information on Zoo programs, events, and exhibits, as well as short descriptions of the Zoo's conservation and research programs. See beautiful pictures of many of the animals. (www.brookfieldzoo.org/)

 
 
      
   
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First published on the Web: 1/26/1998
Last updated: 1/4/2010, 6:50 PM      

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