Science Sites
Encyclopedia of Life
| Science Animations
EarthCam | Funology--The Science of Having Fun | Kid Science News | EurekAlert! |
BBC Science Clips-likew Brainpop but free! | HowStuffWorks Videos | USGS Learning Site | Science Animations | National Geographic Videos | Animal Recordings-Video and Audio | Stock Science Photos

Agriculture | Agricultural Sci4Kids | Harvest of History
Alexander Graham Bell Family Papers  | Amazon Interactive | American Field Guide Video Clips | American Museum of Natural History |
Amphibians | AmphibiaWeb | Amphibians |
Amphibians | What is an Amphibian? | Amphibians | Frogs & Toads | Frogs vs. Toads | Life Cycle of a Frog | Morphology of a Frog | A Thousand Friends of Frogs | Frogs & toads in Color & Sound | Salamanders & Newts | Salamanders & Newts | Salamanders & Newts | Newts | Salamanders |
Anatomy | Human Anatomy Anatomy (Interactive) | Anatomia see also Human Anatomy

Annelids | Ant Farm | Antbase | Apples |
Animals-General-see also the animal name | Animals | Animal Bytes | Animal Explorers | Animal Facts | The Animal Kingdom | Animaland | Animal Diversity Web | Animal Migration | Animal Facts | Animal Information Database | Animal Information-Seaworld | Animal Bytes | Animal of the World | Animals | Animals-BBC | Animals & Nature | Animal Sound Sites | Antarctic Animals | Arctic Animals | Creature Feature from Nat Geo | CritterCam | Exploring Mammals | Field Guide to Animals | Incredible Mammals | Mammals Species of the World | Kids Go Wild | The Life of Mammals | My Life as an Elk | Nature Animal Guides | Wild New England  | Wildfinder-World Wildlife Database see also Mammals below
Antarctic | Antarctic Connection | Cool Antarctica
Ants | Interactive 3D Ant Farm & Pheromone Trail Simulation
Aquariums
| Aquariums | Birch | National Aquarium in Baltimore | New England Aquarium | Monterey Bay Aquarium | Monterey Bay Aquarium Kid's Pages | New Jersey | Oregon Coast | Tennessee Aquarium | Steinhart Aquarium | Florida Aquarium | Shedd Aquarium | Waikiki
Ask Dr. Universe | Ask a Scientist |
Astronomy | Amazing Space | Astronomical Data | Eyes on the Sky, Feet on the Ground | HubbleSite | KidInfo | Online Astronomy Course for Students | Explore Mars Now | Extra Solar Planets | Astro-Venturesee also grade 4 astronomy

The Atmosphere | Atmospheric Optics
Atoms
| The Atoms Family | Atoms | Atoms & Ants | Jefferson's Lab
Aurora Borealis
| Aurora Borealis | The Aurora | Aurora's Northern Lights | Aurora Photo Album | Home of the Northern Lights | Aurora Borealis Finland | Auroras-Paintings in the Sky | AB Alaska | Auroral Activity | Northern Lights
Automotive Learning Online
Aviation | Aviation | First Flight | AeroWeb | Women in Aviation | AeroFiles | FAA Kid's Corner | FAA Aviation Education | Aviation History | Aerospace Team  | History & Principles of Flight | Interactive History of Flight | Famous Firsts in Aviation | Air and Space Museum | Aeronautics | Amelia Earhart  | Air & Space Museum | Airplanes | Wright Bros in Photos | Wright Bros | Wright Papers
Bacteria (Prokaryotes)
Bats | Adventures of Echo the BatBats, Bats Everywhere | Bat World | Bat Info | Bat Facts | Bats4Kids | Enchanted Learning Bats
Bees | Why Do Bees Sting? | Honeybees | Honeybees | Honeybees | Enter the hive | Tales from the Hive | Colony Collapse Disorder | Bees | see Grade 4 page for more bee sites

Bears | Brown Bears | Bears | Bear Pictures | Family Ursidae | Bears | Grizzly Bear | Kodiak Brown Bear |
Bicycles | Big Cats Online | Bill Nye the Science Guy

Biology | Backyard Biology | Biology4Kids | Biology | Biology in Motion | Biology Corner | Biodiversity | Biological Sciences | Encyclopedia of Life
Biomes | Biomes of the World | Tour of Biomes | The World's Biomes | Biomes & Ecosystems | Bios | Biozone | National Geographic WildWorld
Biotechnology
Birds  | All About Birds Enchanted Learning | All About Birds Cornell | Amazing World of Birds | Ask an Expert | Audubon Slide Show | Birds | Bird of the Week | Birding | Birdcam | BirdCentral | Bird Database | Birdsong Links | BirdSource | Virtual Birding Page | Bird Printouts | Peterson Online | British Bird Prints | Audubon | Bald Eagles | Mass Audubon | Spring Migration | The Bird Site | Searchable Ornithology Archive | Audubon's Birds | John James audubon's Birds of America | Birdsong Links |
Black Smokers | Blood | Botanical Garden |
Brain | BrainsRule! | Mystery of Human Brain | Brain Maps | Memory | Inside the Brain
Building Big
Bugs | Bugscope | Butterflies |
see Grade 4 page for more butterfly & insect sites
Bubbles | Bubblesphere | Bubble Town | Exploratorium Soap Bubbles
Buoyancy Basics |
Camels | Camels | Cats | Virtual Cave
Cells 
| The Cell | Cells | Cells Alive | Virtual Cell
Cheetahs | Cheetah Spot | I'm a Cheetah | Cheetahs in a Hot Spot
Chemistry
| Chemistry for kids | Chem for Kids | Chemistry | Chemistry Quizzes | Creative Chemistry | HyperChemistry |
Chimpanzee Central |
Chocolate | Climate | Cloudforest | Color Theory see also "Art" page | Comet Observation
Composting | Composting for Kids | How to Make Compost |
| Cool Science for Curious Kids | Conservation | Copper | Cosmology | Crabs | Cyberscience
Density Experiment | Desert Animals | Desert Animals
Conservation | Field Trip Earth
Coral Reefs
| Reef Education Network | Coral Reef Photobank | 25 Things You can Do to Save Reefs
Dinosaurs-
see grade three page
Diseases | The Discovery Channel

Disasters | Anatomy of a disaster
DNA
| DNA from the Beginning | DNA | DNA Interactive | Putting DNA to Work | Learn Genetics | How to Crack the Code
Dogs | Dogs | Dogs: Wolf, Myth, Hero, Friend
Dolphins | Dolphins | Dolphins in Depth | Animal Planet Dolphins
Dragonfly TV
Earth | Dynamic Earth | Earth from Space | Earth Observatory | Earth & Sky | Earth Science & Geography | Earth Science Enterprise | Earth Picture (flat)  | Earth Picture at Night | NASA's Visible Earth | Earth Science | Hall of Planet Earth Exhibit | The Earth Today | The Encyclopedia of Earth | Maggie's Earth Adventures | Earth Science Courseware | Rotation & Eclipses
Earthquakes | USGS Earthquakes for Kids | Faultline | Earthquake Information | Earthquake Information |
Ecosystems | Ecosystems | Ecosystems | Ecolinks | Ecology
Einstein
Electricity | Theater of Electricity | The Electric Ben Franklin | Electron Microscope Image Gallery | Edison's Miracle of Light
Electronics | Electronics Tutorials | Electronics Projects |
Elements | Elements Flashcards | Elements & The Periodic Table
Elephants |
Elephants | Elephants | Elephant Communication | Elephant Voices | Asian Elephants
Endangered Animals
| AMNH Expedition | Bagheera | Endangered Species | Endangered Species | Endangered Species (different site) | Endangered | Endangered Animals | ESpecies Fact Sheets |  Expedition | Field Trip Earth | Threatened Species | US Endangered Wildlife & Plants | Species of the Next Millenium | Wildlife's Last Resort
Engineering | Animated Engines | Engineering-A siteseer's guide | Engineering Achievements | Big Dig | Building Big | Building Bridges | Bridge Construction & Engineering | Bridge (print & build) | Greatest Engineering Feats of the 20th Century | Sodaconstructor
Environmental Education | Adventure Trails | Environmental Health Science | Environmental Issues Multimedia Lessons | EEK! Environmental Education for Kids | Green Squad  | Environmental Kids Club | Glossopedia-environmental science encyclopedia
Equinox-see Seasons below

Exploratorium Cool Sites
Extraterrestrials
| Seti@home | Seti Institute
Estuary
Evolution | Evolution | Evolution | Complete Works of Darwin |
EPA Explorer's Club | Exploring Leonardo | Explore Science
The Exploratorium | Exploratorium Magazine | Exploratorium Science Snacks | Extreme Science
Feline Conservation Center | Field Guide | Find Out Why |
Field Guides  | enature
Fish | Fish | Fish FAQ | Fish Fun | Fish Index | Fish Tank (Virtual) | FishBase |
Flight | Forces of Flight | Flight | How Things Fly see also Grade "5" page

Forensic Science | The Franklin Institute Online
Flowers | Wildflower Color Chart
Fossils
| Fossil Horse Cybermuseum |
Frogs | Frogs: A Chorus of Color | Froghoo | Exploratorium Frogs | Frogland | Frog Guts.comFrogWeb | Frogs | Interactive Frog Mystery | Froggy Page | Weird Frog Facts | All About Frogs | All about Frogs | Build a Virtual Frog | Life Cycle Cards
Fungus | Fungi | Dr. Fungus
Gardening for Kids | Gecko-Dwarf | Genetics | Genomes | Giraffes | Glaciers | Glacier Images | Global Positioning System | Great Globe Gallery | Galapagos
Health | Heavens Above | Hedgehogs | Herp Care Info | Horses | Express
Galileo | Galileo Project | Galileo Galilei | Galileo's Battle for the Heavens
Genes 
| The Gene Scene | Genetic Science Learning Center | Classical Genetics | Genetically Modified Food | Human Genome Browser | Human Genome Project Info
| Learn.Genetics |
Geologic Time: Story of a Changing Earth
Geysers | Old Faithful WebCam
Giraffes | Giraffe Cam | Pictures & Facts | Tall Blondes |
Glaciers
| All About | Hippo Beach | Horseshoe Crabs
Global Warming | Cool Cities
Gorillas 
| Dian Fossey Gorilla site | Congo Gorilla Forest | Koko Foundation
Heart  | How your heart works | The Heart-An Online Exploration | Cardiovascular System | All About the Heart
How?
How Stuff WorksHow Stuff Works | How Things Work
Humans | Tour of the Visible Human | Human Anatomy | Human Body | Amazing Human Body | Atlas of the Body | 3D Body scanner | MEDtropolis-Virtual Body | Body-Gross & Cool see also Anatomy

Infection Detection, Protection

Insects | BugScope | Insects | Insects | Wonderful World of Insects see also Grade 4 page

Insanely Great Science Sites
Inventions | How Products are Made | Inventions & Patents | Inventors Museum | Invention Dimension | Inventure Place | The Inventor's Workshop | Useless Inventions | Beyond 2000 | Zoom Inventors | Greatest Inventions | Eureka Interactive Exploration of Inventions | How Everyday Things are Made | Nobel E-Museum | Eureka Multimedia Tour | Inventor Links | Marconi Calling | see also Grade 5 page

Headbone Derby
Invertebrates | Myriad World of Invertebratessee also Grade 5 page

Jason Project | Channel Islands | Channel Islands In-Depth | Channel Islands National Marine Sanctuary
Jellies | Jungle Walk |
Kelp Forest | Kidport Science Reference | Kinetic City
Leonardo's Place | Lichens | Life Science Dictionary | Life Science Safari | What is the Speed of Light? | Lions | Lizards | Low Life Labs | Lunar Adventure
MadSciOrg | Magic School Bus | Mammals | North American Mammals | see also animals above | Marconi | MarsupialsMaterials Database | Matter  see also Grade 5 page | The Microbe Zoo | Microbes | Microscope History | Microscopy Images | Images of Nature Microscopy | Microbes | Microbe Zoo |
Manufacturing | How Everyday Things are Made | How Products are Made
Materials Science | Strange Matter
Memory | Meteorites-Earth Impact Database | Molecules | Molecular Workbench | Monkeys | Moon | Exploring the Moon | Google Moon
Museum of Science | Museum of Science and Industry | Museum of Science & Industry-Oregon | Mushrooms
Nanotechnology | Nanotech kids | NanoKids

NASA
| Nasa | Nasa's Observatorium | Nasa Thesaurus | NASA Skywatch | NASA Goddard Space Flight Center | see also Grade 4 page
N
ightlights

National Air and Space Museum | National Geographic Online | National Institute of Environmental Health
Sciences | National Wildlife Federation
eNature | NatureSongs
Newton's Apple| Newton's Castle | Nine Planets

Odyssey Magazine | Ology | Optical Illusions | Optics for Kids |
Natural Wonders | Nature Video Database | Of the World | World Wonders | Natural History Museum
Neuroscience for Kids
Neanderthals
Nutrition
| Plastic Fork Diaries see also Grade 3 page
Oceans
| Explore the Abyss | Oceana | Oceans Alive | Ocean World | Oceans.com | Ocean Explorer | Oceans Intro | Ocean Planet | Oceanography | Year of the Ocean  | Secrets of the Ocean Realm | AquaFacts | Atlas of the Oceans  | Oceanlink | Masters of the Ocean Realm | Secrets of the Ocean Realm | Wyland Ocean Challenge | Nat'l Marine Mammal Lab's Education Site | Marine Animal Records | Sea Vent Viewer see also Grade 1 page
Optical Illusions | Optics for Kids | Science, Optics and You
Otters | Otternet | Friends of the Sea Otter
Paleontology | Paleontological Research Institute | Paleontology Portal
Pandas | Giant Pandas | Pandas | Pandas | Meet the Pandas |
Paper Science | Particle Physics | Pasteur, Louis |
Penguins | Penguins | Penguin Links | Seaworld Penguins | Antarctic Connection Penguins | Penguins Around the World | The Penguin Page | Penguins | Penguin Printouts | WebQuestEmperor Penguin Webquest
Periodic Table | Periodic Table of Elements | Periodic TablePeriodic Table Adventure | Periodic Table Quizzes
ph Factor | Photography | Photography |Photography Museum | Planetariums
PestWorld | Pest Ecology Learning Games
Physics | Flash Animations | Physics 2000 | Physics | Physics | Physics Central | Physlink | History of Physics | Fear of Physics | A Century of Physics A Walk through Time | Physics Education Technology
Planatarium
Planets | Mars Rover Mission Pictures | Mars Images | Mars Exploration | Geology of Mars | Mars Lesson Plan | Map a Planet see also Grade 4 page

Plants | Virtual Plants-120,000 | USDA Plant Database | Great Plant Escape | Plant Answer Machine | Plant Facts and Gardening | Plant Evolution | Plants in Motion Time Lapse | Tropical Plant Database see also Grade 1 page

Plastics | Polar Bears
Ponds | Create a Pond (Internet Explorer) | Pond Science Lessons & Links | Virtual Pond
Popular Science | Powers of Ten | Prairie Dogs | Build a Prairie | Project Dragonfly
Rainforest | Rainforest Heroes | Tropical Rainforest | Elements of the Rainforest | Amazon Interactive | Rainforests of the WorldWays of Knowing Trail | Play Amazon Explorer | Rainforest Animals | Rainforest Sounds | Rainforest at Night | Zoom RainforestRainforest at Night  | Strata | Game K | Kids Saving the Rainforest | Rainforest Video Clips
Ranger Rick | Ravens | Reeko's Mad Scientist | Reef Life | Remote Control Roller | Reptiles
Reptiles | Reptile Republic | see also amphibians above

Rivers | Rivers | River Puzzle | River System Diagram | Journey into Amazonia
Roach World

Robots | Robot Cafe | Robot Museum |
Royal Observatory Greenwich

Savage Earth
Rocks & Minerals | Rockhounds | see also Grade 2 page
Science-General | Access Excellence | Action Bioscience | American Museum of Natural History Ology Site | BioInteractive | Cool Science for Kids | EarthSky.com | Easy Science Experiment Projects | Education World Science Links | enature | Encyclopedia of Earth | Everyday Science | Exploratorium | Exploratorium Science Explorer | Explore Science | Fermilabyrinth | FirstGov Science | First Science.com | Frank Potter's Science Gems | Franklin Institute Science Museum | Funology | I was Wondering-Women's Adventures in Science | Jefferson Lab | Kid Wizard | Kid's Habitat | Kinetic City | MadSciNet: The 24-hour exploding laboratory | Magic School Bus | Museum of Science | National Air & Space Museum | New England Aquarium | New Scientist | ology | OMSI Online Science Activities | Pfizer Funzone | Quotes | Reeko's Mad Scientist Lab | Sandlot Science | Schoolhouse Rock Lyrics | Science Daily | Science.gov | Science Fair Project Ideas | Science for all Americans Textbook in laymen's terms-in Spanish too | Science Junction | Science Knows No Boundaries | SciencenetLinks | Science News  | Sciencemaster | Science Spot | SciVee | Science Whatzit | Science Museums | SciZone | History of Science | Science "Snacks" | Science Resources | Pieces of Science Exhibit | Science Hobbyist | Science Knows no Boundaries | Science Learning Network | Science & Nature for Kids Science News for Kids | Scientific American | ScienCentral News | Science in the Box | Science Rock | Sci-Tech Hypography | Do Science | ScienceWorld | Natl Science Digital LibrarySea & Sky | You Try It | Wondernet | Wonderville | Why Files | ZOOMsci Activities
Sea World | Seashells | Secrets at Sea | Serengheti Photo Safari | Whelmers Science Activities | World Health Org | The Why Files
Seahorses & Pipefish | Docslaw Seaworld | Saving Seahorses | Kingdom of the Seahorse | Secrets of the Seahorse
Sea Turtles | SeaTurtles
Seasons | A Change of Season | The Seasons | Seasons
see also Grade 1 page
Sharks | Myth & Mystery Monterey Bay Aquarium | Sharks | Zoom Sharks | Sharks | Sharks | How Sharks WorkIsland of the Sharks | Biology of Sharks | Sharkman's World | Sharks: Fact & Fantasy Images | Snakes & Reptiles | Sea Turtles
Significant Events Imagery
Simple Machines
see grade 1 & 5 pages
Sky | Skyscraper Museum | Why is the Sky Blue?
Smithsonian Air & Space Museum | Virtual Smithsonian | Snakes | Snow | Soil
Solar System  | Solar System Exploration | Stanford SOLAR Center | see also Grade 4 page | Solar Energy see also Grade 2 page

Solstice | Summer | Winter | Ancient Originssee also "Seasons" above

Sound | Sound | The Physics of Sound
Space | Amazing Space | see also Grade 4 page

Species Inventory | Wildfinder Species Database | Spiders see also grade 1 page | Stork Live | Students for Space Exploration | Star Child | Static
Electricity
Storms (winter) | Subaru Telescope | Sunrise at the South Pole | Sun & Moon Rise & Set Data
The Thinking Fountain |
Tigers | Tigers | Tigers in the Wild | 5Tigers
Time | Time | Telling Time in Different Zones | Telling Time Worksheets | What Time is It? Game | Just in Time | Playing with Time
Tsunami | Tsunami | Waves of Destruction | The Big Wave |
Turtles | Turtles
Universe Atlas
see also Grade 4 page
Volcanoes
Volcano World | How Volcanoes Work | Underwater Volcanoes & Seafloor Activity | Can we predict volcanoes? | Volcanology |
Water | Drinking Water |
Weather | The Weather Channel | Weather Underground | World Weather | National Hurricane Center see also grade 5 "weather"

Web of Species (Local plants and animals)
WebCams | National Zoo | Minnesota Zoo | Gators |
Whales
| Whales| Whale Songs | Whale Songs | Bay of Fundy Whales | Whales | Cetacea | Basque Whalers in Labrador | Whales | Whale Anatomy | What About Whales? | History of Whaling | History of Whaling | Whales Theme Page | Whalenet| Narwhal | Discovering Whales | Cetacea
| Whooping Crane | The Why Files the science behind the news
| Wild World | African Wildlife Foundation | Wild Ones
Wolves | Wolf Hollow | Wolves | BoomerWolf
Woods Hole Oceanographic Institute Image Gallery
Worms | Worm World | Worms | Adventures of Herman the Worm
Yellowstone Natl Park | Yes Science Magazine | Yes I Can Science | Your Gross and Cool Body | The Yuckiest Site on the Internet
Zebras
Zoos | Alaska Zoo | Belize Zoo | Birmingham Zoo | Brevard Zoo | Bronx Zoo | Brookfield (Chicago) | Columbus Zoo & Aquarium | Fort Worth WhoZoo | Kids Go Wild | Electronic Zoo | exZOOberance | Honolulu Zoo | Indianapolis Zoo | Los Angeles Zoo | Nashville Zoo | National Wildlife Federation | National Zoo | Oakland Zoo | Oregon Zoo | Perth Zoo | Philadelphia Zoo | San Diego Zoo | San Francisco Zoo | Southwick's Wild Animal Farm | Toronto Zoo | Utah's Hogle Zoo | Woodland Park Zoo Multimedia | Zoonet | Zoo-The Electronic | Zoos | Exzooberance | Switcheroo Zoo | ZooWeb | Zoo in the Wild | Zooish | Zoo Trip