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Y ou can use an ordinary dictionary to find extraordinary histories of words. This information is packed between the two brackets [ ] right before the definition of the entry word. (For an even richer experience, explore the venerable twenty-volume Oxford English Dictionary with its wealth of detail.) L ook up the word window . You'll find that it comes from the Middle English (ME) windowe , which came from the Old Norse (ON) vindauga , which itself was formed from the two Old Norse words vindr , which meant "wind," and auga , which meant "eye." So window once meant "wind-eye," a poetic description appropriately suggesting a window's function of letting in both air and light.
Magazine: Language: Word Histories
Photosynthesis | Asset
The photosynthesis process is the process by which plants, algae and many types of bacteria convert carbon dioxide into organic compounds, such as sugar by using the energy from sunlight. This sugar is glucose, which is their food. A common by-product of photosynthesis is oxygen, as both carbon dioxide and water are needed for this process to occur. This process is vital to all life on Earth. Not only does it help maintain the normal level of oxygen in the atmosphere for aerobic life (air-breathing) to live on, but also all life depends on it as a source of energy, or indirectly as source of energy in their food.
The "Earthquake Machine" is a simple model of the earthquake process using a wood block, sandpaper, and rubber bands. This model shows how "Forces, Faults, and Friction" interact as elastic energy is slowly stored as the rubber back stretches and then rapidly released as the block jerks in an "earthquake". Although this physical model is very much simpler than the interaction of forces, fault, and friction on a real geological fault, the model does demonstrate the unpredictable nature on earthquakes. <p style="text-align:right;color:#A8A8A8"></p>
Introduction to Plate Tectonics and Earthquakes - Instructional Aids | Teachers on the Leading Edge
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