The digestive system is a group of organs (from the mouth to the rectum) that processes food so the body can use it. The following sites explain the process with illustrations and animations for all age groups.
Sources of light interactive activity
Human anatomy is the study of the human body. The word "anatomy" derives from Greek words meaning "to cut up" because early scientists studied anatomy through dissections.
Ever wonder why the northern and summer hemispheres have opposite seasons? Or why the longest day of the year is considered the start of summer?
challenge pack full of activities and projects for you to do in Science and Engineering
Optics, the science of light, is studied by both scientists and engineers. It includes defining light, learning how it is produced, how it travels, and how it is measured. Today's picks run the gamut from simple science for K-3 students, to sites appropri
Science Snacks are "miniature versions of some of the most popular exhibits at the Exploratorium" science museum of San Francisco.
"In this lesson, you'll learn that light is very unusual even scientists think so.
This excellent site for elementary students (along with its sister site Optics for Teens at http://www.
"An age-old debate which has persisted among scientists is related to the question, 'Is light a wave or a stream of particles?' Very noteworthy and distinguished physicists have taken up each side of the argument, providing a wealth of evidence for each s
Another one for the high-school and college crowd, this physics primer from Florida State University is part of a larger site on microscopy, which is research using microscopes.
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