Matter  
Changing Matter States of Matter Game Yucky Kids Discovery
Properties of Matter Matter Matching Atom's Family
States of Matter Matter vs Volume Quiz Roller Coaster Physics
Particles in Matter Changing States Properties and Changes Comprehension
Gases Around Us Molecules Mixtures
Matter    

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Scientific Method  
Quia Scientific Method Jeopardy Scientific Slugger Assorted Interactive Web Labs (advanced)
Scientific Method and Introduction Scientific Method - Leaning Tower of Pisa Scientific Method Quia Quiz
Scientific Method Activities Pendulum Scientific Method Lab Slideshow

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  Measurement  
Metrics Matter Matching Equivalent Measurements Convert US Lengths
Metric System Measurement Metric Measurement Measure It!
Animal Weigh In Artie Ounces Soda Jerk Thermometer Applet
Measuring Measurement Measurement Word Search Hot Stuff
Customary Equivalent Practice A Dictionary of Units of Measure Alien Weigh In (Scales)
Math Cats Balance Teaching Measures PBS Cyberchase
Spring Lab E-Lab Mass Balance Interactive Thermometer 2
Measuring Metric Length Graduated Cylinder Pod's Mission (hotter/colder)
Thermometer Quiz   Estimate Celsius

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Forces and Motion  
Planet X Gravity Game Physics in Sports Position, Velocity, Acceleration
Discovery School Forces and Motion NASAKids Collisions
Basketball Jumpshot Gravity Activity Ball Shooting Cart
Ball on String Newton's Cradle Seesaw
Friction Quia Forces and Motion Space Station - 3rd Law of Motion
Friction Activity Forces and Motion Videos Shoot a Cannonball
Friction Simulation Newton's Laws Quiz Fear of Physics
Forces and Movement Forces Lab Forces and Motion
Forces in Action Roller Coaster Planetary Rescue Squad

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  Simple Machines  
Rube Goldberg Inventions Dirtmeister's Simple Machines Simple Machines Review and Quiz
Leonardo's Mysterious Machinery

Edheads Simple Machines

Simple Machines Overview
Simple Machines Info Simple Machines Quiz Simple Machine Examples
The Odd Machine Rat Machines Inventor's Toolbox
Goldburger to Go Mechanical Madness Invention at Play

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Human Body  
Amazing Human Body Human Body Systems Bones
Body Bones Arm Bones Gastronet
How the Body Works Movies How Muscles Work How Stuff Works
Multitalented Muscles My Body Science Bob
Virtual Knee Surgery Surfing the Human Body Digestive System
Human Body Virtual Hip Surgery Human Heart
  Body Muscles  

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Water Cycle/Weather  
Cloud Puzzles Wild Weather Adventure Water Cycle Explanation
Weather Info Wunderground Water Cycle Comprehension
USA Today Edheads Weather Temperature
Air Pressure Weather Channel Weather
Kid's Weather Sites Wild Weather National Weather Service
Weather Dude Weather or Not Wind Chill
Web Weather for Kids What is Weather Weather Wizards 
Thunderstorms Intellicast Weather Maps

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Nutrition
Food Safety Coolfood Planet Food Pyramid

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Plants and Animals  
Creature World Classification The Animal Kingdom
Bug Guide Rainforest Trade-Offs MO Conservationist Magazine

Classifying Critters

 Animal Planet Skeletons and Skulls
Six Kingdoms Worm World and Roach World - Yuckiest Site on the Internet Animal Classification Quiz
Journey North for Kids Invertebrates Sites for Animal Research
Animal Kingdom Quiz Dichotomous Key Pattern Animal Atlas
Animal Comparisons Build a Skeleton Animal Atlas TV Show
Big Bob's Biodiversity Adventure Vertebrates Pond Life
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Space  
Zoom Astronomy Size Perspective Space Station
Revolution Kid's Astromony NASA for Kids
Build a planet Earth in Space Planetary Posse
Earth, Moon, Sun    
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Miscellaneous  
Bill Nye the Science Guy Physics Simulations Electricity/Magnetism
Lab Safety Tutorial Kidport Science Index Internet4classrooms
  Exploratorium Links Updated 1-9-12