Curated OER
Egg Walk Challenge
Students design plastic shoes to walk on eggs without breaking them. In this pressure lesson, students consider all the factors needed to design shoes to walk on eggs without breaking them. Students calculate the PSI pressure, the force...
University of Illinois
University of Illinois: The Photosynthetic Process
Site describes process of photosynthesis, including role of pigment molecules, electron transport, ATP synthesis, and carbohydrate synthesis. Includes links to illustrative graphics.
Encyclopedia of Earth
Encyclopedia of Earth: Air Pollution & Air Quality: Air Quality Index
Describes the features of the air quality assessment indices used in a variety of countries around the world. (Updated: October 25, 2011)
Other
The Skeptic's Dictionary: Occam's Razor
This site offers an intuitive look at "Occam's Razor," the philosophical statement of the "principle of unnecessary plurality." Content focuses on the life and role of William Ockham; the history of this particular philosophy; as well as...
PBS
Pbs Teachers: Why Do Elephants Have Big Feet?
Explain how an organism's adaptations give it advantages in particular environments. Calculate and compare the amount of pressure exerted by the foot of an elephant and a human, and apply that knowledge to an understanding of automobile...
Science Struck
Science Struck: Barometer Units
Explains the different measurement units that are used in barometers and provides conversion tables.