Science

National Science Digital Library - Resources for all Sciences
Encyclopedia of Life
NASA for Students 
Scitable
Physics Database 
Science Database 
Science Journal Articles 
Measuring & Converting Everything

Animals
Birds - Audobon 
Endangered Species
Animal Doc - Veterinary Medicine
Reptiles & Amphibians

Chemistry
Chemical Elements.com
Web Elements.com 
Women in Chemistry
Chem Guide / Understanding Chemistry 
Chemistry Online
Chemistry Links from Chemdex

Diseases & Disorders

Drugs & Addiction
Alcohol and Drug Information for Teens  

Earth Sciences
Earthquakes for Kids - USGS  
Global Warming_ Early Warning Signs
Hurricanes for Kids
The Tornado Project Online!
Virtual Cave
Volcano World
Yahoo Volcanoes 

Human Body
Atlas of the Human Body
Bone Biology

Human Reproductive System
Nova Video – Life’s Greatest Miracle
BodyGuide - Reproductive System
Human Reproduction and Development
Female Reproductive System
Male Reproductive System

Life Sciences
Encyclopedia of Life
Bio-Mimicry Links
Marine Biology
Evolutionary Biology Link
Endangered Species
Earth Floor Biomes
Blue Planet Biomes
Darwin Online
Evolution
Galapagos Islands  
Plant Database

Medicine
Medline 
Merck Manual 
AMA - Homepage 
Medgle

Natural Disasters
“Top Ten” Potential Disasters 
FEMA Disaster Page 
Wikipedia Disasters 
10 Worst Natural Disasters 
Natural Disaster Info 
World News / Natural Disasters 
Disasters from Space / NASA 
Natural Disasters - Kidsclick Links 
Natural Disasters - Google Directory 

Planets & Solar System
The Nine Planets
Stanford SOLAR Center
Windows to the Universe - Astronomy & Earth
NASA Images
Phases of the Sun, Moon & Eclipses 
Antimatter - Mirror of the Universe

Technology & Inventions
InventorsToolbox The Elements of Machines
Bridge Construction and Engineering Home
THE K-8 Aeronautics Internet Textbook
Exhibits Collection -- Amusement Park Physics
Inventors and Inventions - EnchantedLearning.com
Inventors & Inventions - Yahoo
How Stuff Works

Weather
Weather Questions
Weather 101
National Weather Service
Weather Extremes
El Nino Info
Lightning
Tornadoes / Hurricanes
Clouds
More Clouds
World Weather/BBC

Women & Science
4000 Years of Women in Science
AWIS Hompage
Historia / Women in Science
UCLA / Women in Physics
Institute of Physics
American Institute of Physics
IUPAP - International Union of Pure & Applied Physics
Women of NASA
Women Oceanographers
Nogales Lab - Lawrence Livermore Lab