Plantary properties has a great lesson for your weight and age on other planets.
More than 25 hands-on science activities are provided in classroom-ready pages for both teachers and students for exploring Earth, the planets, geology, and space sciences.
A well designed science 3D simulation showing the position of the sun and moon from any position on the Earth in real time or at a certain time in the past or future. Also see the moon phase and sun rise and set times.
http://ictmagic.wikispaces.com/Science
Time lapse sequences of photographs taken by the crew of expeditions 28 & 29 onboard the International Space Station from August to October, 2011, who to my knowledge shot these pictures at an altitude of around 350 km.
Fascinating time lapse video from the International Space Station showing a view of the globe including cities lit up at night, and the Northern Lights flickering in the upper atmosphere.
A great set of interactive space resources. Learn about day and night, orbits, phases of the moon and more. Choose a topic from the menu and explore with your class.
http://ictmagic.wikispaces.com/Science
This site is designed especially with the young learner in mind with its age-appropriate content and emphasis on visual and auditory learning.
Glossopedia is the kind of site that you can leave open for students to explore and find a fast fact of the day, find their favorite image, or video
Glossopedia Categories
Geography and Places
Nature and the Environment
Technology
Animals
Earth and Space
People and Cultures
Human Body
Chemistry
Natural Forces
This site is simple and visually pleasing. The font size is great for young learners. Words are hyperlinked to an audio pronunciation that is a real person, speaking really slowly at first then more quickly, and finally the written meaning of the word. Images and photos have a print button prominently displayed.