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Ecology
Bottled Water Backlash
Bottled water is out, and tap water is in, says the May/June 2008 cover story of E – The Environmental Magazine (now posted at: www.emagazine.com). Call it reverse snob appeal. These days, it’s the tap water enthusiasts, concerned about the environment, who get to act self-righteous. Just like it has become cool to bring your own cloth bags to the grocery store and your own mug to the coffee shop, the reusable water bottle is the hip, new eco-accessory.
May 7, 2008, 22:37 PST
Chemistry
A Simple Interactive Periodic Table
If you need a simple interactive periodic table, this one will be perfect. You'll find out the element's Name, Number, Weight, Melting Point, and Boiling Point.
May 6, 2008, 20:29 PST
Chemistry
The Best Periodic Tables
Some of the most interesting periodic tables on the Internet are brought together in this collection. If you are studying chemistry, this is not to be missed.
May 6, 2008, 17:39 PST
Chemistry
Advanced Interactive Periodic Table
Download this excellent periodic table from Los Alamos National Laboratory. It will take awhile to download if you're on a dial-up (2.8 mb), but if you're studying chemistry it's a great tool to have!
PDF format - Adobe Acrobat required [ Download/View File ]
May 6, 2008, 09:16 PST
Chemistry
Periodic Table of the Elements (with atomic mass)
This great periodic table is ready to use here on ClassBrain. For each element it includes the atomic number and atomic mass easily visible, then if you click on the element, you'll find everything else you need for your Chemitry assignments.
May 6, 2008, 05:23 PST
Ecology
Low Environmental Impact Seafood
How can I find out which seafood to avoid if I am concerned about lessening my impact on the environment and avoiding consuming unhealthy pollutants?
Apr 6, 2008, 17:04 PST
Ecology
Measure Your Environmental Impact
One of the first things you have to do before you can address a problem like global warming to get some sort of an idea of how severe the problem is. In this case, what is your impact on CO2 emissions?
Mar 31, 2008, 10:30 PST
Ecology
Turn Out Your Lights Tonight For Earth Hour
Participate in Earth Hour on March 29th, 2008 by turning off your lights for one hour from 8PM to 9PM. When this took place in Sidney, Australia in 2007 the reduction in greenhouse gases was equivalent to taking 48,000 cars off the road.
Mar 29, 2008, 12:00 PST
Ecology
Urban Parrot Colonies
At least three dozen different parrot species are now considered threatened or endangered in their quickly shrinking native tropical and sub-tropical habitats (mostly in South America). As such, the health of wild flocks in the U.S. and other developed countries around the world may well be key to preserving these birds that could otherwise go extinct.
Mar 22, 2008, 15:24 PST
Ecology
Recycling Old Clothes
The typical U.S. city with 50,000 residents has to pay (with local tax dollars) for the handling and disposal of some 3,000 tons of textiles every year. The shame of such waste is that textiles are so easy to recycle or otherwise find new uses for.
Mar 22, 2008, 15:11 PST
Astronomy
The Vanishing Rings of Saturn
The rings of Saturn have narrowed visibly in the last year. Are they disappearing? Four hundred years ago, the same phenomenon puzzled Galileo.
Mar 18, 2008, 20:47 PST
Ecology
Earth-friendly Chocolate
I heard a reference to “Earth-friendly chocolate” and was wondering about what goes into chocolate that would raise environmental concerns? -- Ben M., Providence, RI
Feb 3, 2008, 19:33 PST
Ecology
What is the status of sharks around the world?
Humans do a lot more damage to shark populations than vice versa. Marine biologists report that sharks are in rapid decline around the world. In the North Atlantic Ocean, shark populations have declined more than 50 percent over the past 20 years alone, with some species now nearing extinction.
Jan 26, 2008, 11:11 PST
Ecology
How do Carbon Offsets Work?
Carbon offsets are monies that consumers and businesses pay voluntarily to compensate for the greenhouse gas emissions they generate directly by driving, flying, running the air conditioning and otherwise using non-renewable energy.
Jan 13, 2008, 00:25 PST
Ecology
How much of an effect, if any, does the carbon dioxide in carbonated beverages have on global warming?
A typical 12-ounce can of soda contains up to six grams (.013 pounds) of carbon dioxide (CO2) gas, which either escapes into the atmosphere from the liquid upon opening, or from your body after you consume the contents. So yes, drinking carbonated beverages does contribute to your “carbon footprint,” but only ever so slightly.
Dec 27, 2007, 15:13 PST
Astronomy
Asteroid Threatens to Hit Mars
Asteroid 2007 WD5 is expected to cross the orbital path of Mars early next year, and has a 1 in 75 chance of colliding with the planet according to NASA.
Dec 27, 2007, 09:14 PST
Ecology
Living Roof Takes the California Academy of Sciences Green
The new California Academy of Sciences is slated to open in October 2008 with an advanced green architecture design featuring an amazing living roof. The entire complex was designed by Renzo Piano with ecology in mind, but the living roof is one of its most intriguing features.
Dec 17, 2007, 14:31 PST
Ecology
Paper and The Environment
Dear EarthTalk: I would think that the glossy paper used by most magazines is bad for the environment, yet most publishers still use it, even the outdoors and environmental titles. What’s the scoop? Is paper made glossy by using chemicals that are not safe? -- Kellina H., via e-mail
Nov 4, 2007, 05:51 PST
Ecology
Water Conservation Tips
When your community is struggling with an extended drought like California has, many communities urge voluntary conservation measures. Many of these conservation campaigns encourage every person to work to save just 20 gallons of water each day.
Oct 9, 2007, 22:15 PST
Astronomy
Two Moons Hoax - Mars
On August 27, 2007 some people have said that Mars will be so close it will appear as large as the moon. This is not true. However, there will be a surprise in the sky for astronomy buffs.
Aug 23, 2007, 19:46 PST
Astronomy
Flyby of Jupiter and Its Moon
Never before have we received such amazing photos of Jupiter and its moons. Learn more about what the astonomers saw when the New Horizons spacecraft did a flyby of this large planet.
May 1, 2007, 21:23 PST
Astronomy
Studying the Cosmos
If you are forever staring into space wondering about the beginnings of the universe then the Cosmic Journey will be a fascinating exploration.
Jan 31, 2007, 06:57 PST
Biology
Get Body Smart
We are very excited to share this excellent resource on anatomy and physiology with the students and teachers at ClassBrain. Our friend Scott Sheffield of ConceptCreators, Inc. has created these excellent study materials and has kindly agreed to share them with us.
Dec 14, 2006, 13:51 PST
Biology
The Immunology Lab
This virtual immunology laboratory will demonstrate how such a test, termed an enzyme-linked immunosorbent assay (ELISA), is carried out and show some of the key experimental problems that may be encountered.
Dec 12, 2006, 00:59 PST
Biology
The Neurophysiology Lab
Record electrical activities of individual neurons in this interactive neurophysiology while you deliver mechanical stimulus to the attached skin. Inject fluorescent dyes into the neurons to visualize their morphology.
Dec 12, 2006, 00:49 PST
Biology
The Cardiology Lab
The focus of this interactive Cardiology Lab is on heritable diseases of the heart. You are cast here as a virtual intern to accompany a doctor examining three different patients.
Dec 12, 2006, 00:43 PST
Biology
The Bacterial Identification Lab
The purpose of the Bacterial Identification Lab is to familiarize you with the science and techniques used to identify different types of bacteria based on their DNA sequences.
Dec 12, 2006, 00:35 PST
Biology
Transgenic Fly Lab
The Virtual Transgenic Fly Lab will familiarize you with the science and techniques used to make transgenic flies. Transgenic organisms, which contain DNA that is inserted experimentally, are used to study many biological processes.
Dec 12, 2006, 00:23 PST
Biology
Genetic Testing of Female Athletes
At times those responsible for conducting high-stakes athletic competitions like the Olympics have been greatly concerned with gender testing athletes. Learn why verifying a person's gender may be harder than you think.
Dec 11, 2006, 13:08 PST
Biology
Molecular Menagerie
Small molecules are chemicals that can interact with proteins to affect their functions. Learn about the structure and biological functions of various small molecules like sugar and caffeine.
Dec 11, 2006, 13:01 PST
Biology
Origins of Modern Humans
All living humans originated from populations of ancestors who migrated out of Africa less than 100,000 years ago. Learn how scientists have used genetic markers to trace the migration routes and origins of modern human populations.
Dec 11, 2006, 12:54 PST
Biology
How The Body Uses Fat
Fat is tissue, a type of cell, and a substance. Watch a Flash slide show that delves into the various molecular shapes that fat can take.
Dec 11, 2006, 12:40 PST
Biology
Molecular Structure of Fat
Fat is tissue, a type of cell, and a substance. Learn about the chemical and molecular structure of fat and how it relates health. A Flash slide show that delves into the various molecular shapes that fat can take.
Dec 11, 2006, 12:30 PST
Biology
Measuring Obesity
There is no way to directly measure how much fat a living person has. Learn about the various methods used by researchers and fitness advisors to estimate a person’s body fat.
Dec 11, 2006, 11:43 PST
Biology
RNA Diversity
RNA is an information molecule that can also function as an enzyme. This biology mini-lesson is illustrated with interactive Web animation to show the many different forms that RNA can take.
Dec 11, 2006, 11:36 PST
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