General Science & SQOTW (Science Questions of the Week)

A+ Learning Galleries For Fun Science Learning
ScienceMaster Learning Galleries are a place to learn, to explore, to understand; from the microscopic to the cosmic. Each Learning Gallery contains a collection of images relating to one science or nature topic.  Great pictures.
Discovery Online, The Skinny On ...
Ever wonder what makes a sonic boom, why sports clothes stink, or why ice cubes shrink in the freezer? Here's "the skinny" on life's tough questions from The Discovery Channel.
Discovery School

Homework help, tools to help you study, games to challenge your mind, and tons of great  nearly a dozen learning adventures that let you explore everything from Ancient Egypt to the Space Station.
ExploreScience.com
Highly interactive science activities for students and educators, with emphasis on physics.
Extreme Science - The Ultimate Online Science Experience
Explore time, weather, space,earth science and living creatures.
The Exploratorium
Webcasts, science news, and learning activities in space, sports, and more.
How Stuff Works
How Stuff Works is a great place to learn about how things work in the world around you. Have you ever wondered how the engine in your car works, or what gears do, or what makes the inside of your refrigerator cold? A new article gets added every week. Sections include: Engines & Motors; Around the House; Electronics; Computers; Food; and Your Body.
Imaginary Lines
Join the Sally Ride Science Club, start a Community Science Festival, find out about girls in science.  Imaginary Lines was founded by former astronaut Sally Ride to provide support for all the girls who are interested in science, math and technology.
The Last Word (New Scientist)
Questions & answers on everyday scientific phenomena.  Categories include animals, energy and forces, food and drink, plants, weather, gadgets, the universe, your body, and more.
National Geographic World Magazine for Kids
Explore the world with National Geographic magazine features.
Science Homework Helper
Great information on any science subject from Fact Monster.
Science Question of the Week
A challenging new question every week, from the Goddard Space Flight Center.  Seven years of questions and answers archived here.
Web Elements
WebElements aims to be a high quality source of chemistry information on the WWW relating to the periodic table.  Click on an element on the table to get all the key information.