We found the first Australian evidence of a major shift in Earth's magnetic poles. It may help us predict the next. About 41,000 years ago, something remarkable happened: Earth’s magnetic field flipped and, for a temporary period, magnetic north was south and magnetic south was north.
Palaeomagnetists refer to this as a geomagnetic excursion. EOSDIS Worldview. Explore the ocean LIVE with Dr. Robert Ballard and the Corps of Exploration. Indigenous Weather Knowledge. Aboriginal and Torres Strait Islander people have developed an intricate understanding of the environment over many thousands of years.
Lost World. Cities turn to desalination for water security, but at what cost? This is the first of two articles looking at the increasing reliance of Australian cities on desalination to supply drinking water, with less emphasis on alternatives such as recycling and demand management.
So what is the best way forward to achieve urban water security? Removing salts and other impurities from water is really difficult. For thousands of years people, including Aristotle, tried to make fresh water from sea water. When water is scarce, we can't afford to neglect the alternatives to desalination. This is the second of two articles looking at the increasing reliance of Australian cities on desalination plants to supply drinking water, with less emphasis on the alternatives of water recycling and demand management.
So what is the best way forward to achieve urban water security? An important lesson from the Millennium Drought in Australia was the power of individuals to curb their own water use. This was achieved through public education campaigns and water restrictions. Australia's pollution mapped by postcode reveals nation's 'dirty truth' Updated about an hour agoFri 16 Nov 2018, 2:53am On the fringes of Australia's biggest cities, people work, live, and play next to some of the nation's biggest polluters.
Key points: National Pollution Inventory data has been mapped according to postcodes The Australian Conservation Foundation report reveals the country's most-polluted postcodesBotany Bay in Sydney and Altona in Melbourne are the cities' most-polluted areas. Virtual Reef Diver. What Causes Ocean Currents? The systems of ocean surface currents and deep water currents are, as expected, connected, but the locations of the physical connections are limited to three areas (one per main ocean), and are all on the Northern Hemisphere.
The downwelling occurs on the Northern Atlantic, while the upwelling occurs on the Northern Pacific and the Northern Indian Ocean, as shown on the side map. The extents of the continental shelf block, or at least seriously limit, the movement of the ocean currents. To see a 3D view of the Conveyor Belt enlarge the diagram below. 1. Due to the friction between air and water, winds create surface currents that carry water masses from the equatorial areas toward northern (and southern) polar zones. 2. 3. Volcanoes: How often do they erupt and what happens when they do? - Science News - ABC News. Planet Earth is covered in hundreds of volcanoes, many of which will be erupting at any one time.
Many of us only notice volcanoes when they are about to explode or disrupt our travel plans, but these spectacular forces of nature can have a significant impact on people living in the local area. While volcanoes can be destructive, they are also responsible for creating rich agricultural soil, minerals like gold and silver, diamonds, hot springs and geothermal energy. So how do these iconic wonders form, and what risks do they really pose? What is a volcano? A volcano is like a chimney that allows hot liquid rock, called magma, to flow from a layer within the Earth and erupt onto the surface.
What the World Will Look Like 4°C Warmer. Micronesia is gone – sunk beneath the waves.
Pakistan and South India have been abandoned. And Europe is slowly turning into a desert. This is the world, 4°C warmer than it is now. But there is also good news: Western Antarctica is no longer icy and uninhabitable. Smart cities thrive in newly green and pleasant lands. What the World Would Look Like if All the Ice Melted. This story appears in the September 2013 issue of National Geographic magazine.
The maps here show the world as it is now, with only one difference: All the ice on land has melted and drained into the sea, raising it 216 feet and creating new shorelines for our continents and inland seas. There are more than five million cubic miles of ice on Earth, and some scientists say it would take more than 5,000 years to melt it all. Abrupt glacier melt causes Canadian river to vanish in four days. Updated A vast glacier-fed river which flowed from Canada's Yukon territory across Alaska to drain into the Bering Sea has disappeared in just four days, in what scientists believe is the first observed case of "river piracy".
High average temperatures in the first three months of 2016 caused a dramatic spike in the amount of meltwater flowing from the Kaskawulsh glacier, carving a deep canyon in the ice and redirecting the flow toward the Alsek River in the south, rather than the north-flowing Slims River. That changed the Slims River from a three-metre-deep, raging torrent to a place where "massive afternoon dust storms occurred almost daily", according to a scientific paper published in the journal Nature Geoscience.
11 Meaningful Earth Day Activities for Every Grade Level. Our students are the future caretakers of our Earth. These fun Earth Day activities help empower kids to have a positive impact on the planet. From recycled art projects to farming simulations, here’s how to roll out the green carpet in your classroom on Earth Day this year. 1. Welcome - Digital Explorer Digital Explorer. Resources: lesson plans, videos - Nature Works Everywhere. Ice and sky. Habitats of Animals.
How Water Cycle Works. A Journey through Climate History. The Habitable Planet. Garbage. If your habits resemble those of average Americans, you generate about 4.6 pounds of solid trash per day. This adds up to big trouble for the environment. Americans are generating waste products faster than nature can break them down and using up resources faster than they can be replaced.
How can we find ways to meet our current economic and social needs without compromising the ability of our children, and our children's children, to do the same? Our success will depend on understanding the difference between Sustainable practices: practices that provide ongoing economic and social benefits without degrading the environment. In this exhibit, you can find out how to improve next year's environmental record. Simply Geology. Encyclopedia of Earth. One Ocean: The Nature of Things with David Suzuki: CBC-TV. One Ocean Download Unity Web Player Get Unity 3D to Play The Unity Web Player enables you to view blazing 3D content created by the Unity gaming engine directly in your browser, and autoupdates as necessary. Download Unity Web Player: Install Now! Breathingearth - CO2, birth & death rates by country, simulated real-time. Carbon Dioxide Emissions.
Climate Change: Vital Signs of the Planet. What on EARTH affecst climate? What is global warming? The Global Campaign for Climate Action. A History of Climate Science. Skeptical Science takes a different approach to Naomi Oreskes' Science paper who sorted her papers into "explicit endorsement of the consensus position", "rejection of the consensus position" and everything else (neutral). In this case, the backbone of our site is our list of climate myths. Whenever a climate link is added to our database, it is matched to any relevant climate myths. Therefore, each link is assigned "skeptic", "neutral" or "proAGW" whether it confirms or refutes the climate myth. This means a skeptic paper doesn't necessarily "reject the consensus position" that humans are causing global warming.
It may address a more narrow issue like ocean acidification or the carbon cycle. There are a large number of neutral papers. Climate Science Info Zone - There are many institutions and organisations around the world researching climate science, how our climate is changing, and ways of responding. Here are just a few… Laboratory Manual for Introductory Geology: W. W. Norton & Company. The Science of our World. What Is a Wind Farm? Geologic Time Clock. Where does rain come from? - Science (2) - ABC Splash - Overview. Earth needs its atmosphere! - Science (10) - ABC Splash - Overview. Cooking carbon to make crude oil. KML Archive. Introduction I am a British/American volcanologist, neogeographer and undergraduate educator.
My scientific interests incorporate a mixture of physical volcanology, geomorphology, remote sensing and other geospatial tools, such as Google Earth. OurAmazingPlanet.com. Plate Tectonics - Crust, Lithosphere, Mantle. Topics Plate Tectonics Crust Lithosphere Mantle Density Buoyancy Earth Science Description. Label the Diagram Game : Types of Rocks #1. The Learning Zone: Rock Cycle Games. Skip to content Home Animals Fossils Insects Minerals Rocks Funstuff. Free Lesson Plans For The Environment. The environment is a hot topic – in the news, in politics, and in schools, especially in STEM . Since many aspects of environmental issues are practical, everyday things that even younger students can see, the topic lends itself well to a variety of teaching methods like Project Based Learning and Challenge Based Learning .
Earth Exploration Toolbook. Awarded Science Magazine's Science Prize for Online Resources in Education (SPORE), September 30, 2011. Biome/Habitat Animal Printouts. Animal Adaptations. Build an online habitat. Videos: Oceanography. Water Cycle - Earthguide Animated Diagram. Weathering animation. The Hidden Water We Use. Weather. New Englanders have a saying: "If you don't like the weather, just wait a minute. " Volcanoes. The Rock Cycle. Dynamic Earth.