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Bibliothèque virtuelle Les plaques tectoniques. ​Les plaques tectoniques sont de grands morceaux de la lithosphère qui se déplacent en surface du manteau terrestre.

Bibliothèque virtuelle Les plaques tectoniques

Ces plaques peuvent s'éloigner les unes des autres, se frotter, entrer en collision ou glisser l'une sous l'autre. L’écorce terrestre n’est pas homogène. Elle n’est pas constituée d’un seul morceau. La lithosphère est en fait séparée en plusieurs morceaux. Elle ressemble plutôt à un gros casse-tête. Survival Capsule. Cartonner à l'examen! - devienscitoyen.ca. Canada 150: Could you pass the Canadian citizenship test? How tsunamis work - Alex Gendler. 15 Most Destructive Natural Disasters in History. Le top 5 des catastrophes naturelles capturées en vidéo. La vérité sur le Canada ! arrête à 10:00. Le bac à sable @ScienceAnim. Drill holes in some wood and put it outside. Good job — you just helped save the bees.

The lazy person's guide to saving the world - United Nations Sustainable Development. End extreme poverty.

The lazy person's guide to saving the world - United Nations Sustainable Development

Fight inequality and injustice. Fix climate change. Whoa. The Global Goals are important, world-changing objectives that will require cooperation among governments, international organizations and world leaders. It seems impossible that the average person can make an impact. Small Smurfs Big Goals. Tips for Schools - Earth Hour Australia 2017. Earth Hour Schools Day: Friday 24th March Register for Earth Hour Schools Day Every year, schools have helped make Earth Hour the incredible event it is.

Tips for Schools - Earth Hour Australia 2017

Schools across Australia have been some of Earth Hour’s biggest supporters; thousands of teachers have used Earth Hour lessons in classrooms across Australia, hundreds of classrooms have aired the Earth Hour documentaries, and schools have hosted Earth Hour events, assemblies and activities. In 2017, early education centres, primary, and secondary schools are invited to celebrate Earth Hour on Earth Hour Schools Day, Friday 24th March. This year, with Earth Hour focused on the voice of the future generation, we invite all schools, teachers and students to take part and #JoinTheFuture by: Canada-U.S. Border Is More Bizarre Than You Thought (VIDEO) PRINTSHOP — Daily Overview. Why Hurricane Categories Make a Difference. This NASA animation tracks vanishing Arctic sea ice - Download Facebook Videos. If The World Were 100 People. These Photos Capture What It's Like To Be A Fourth-Grader Around The World.

Mexico City, Paris, Madrid, Athens To Ban Diesel Vehicles. Mexico City has joined with Paris, Madrid and Athens in committing to eliminating diesel vehicles from their cities by 2025.

Mexico City, Paris, Madrid, Athens To Ban Diesel Vehicles

The agreement was announced at the C40 Mayors Summit in Mexico's capital late Thursday. A statement said the commitment would reduce air pollution and related health issues in those cities, while also helping cities meet climate goals. 16 stunning pictures taken from space in 2016. As 2016 comes to an end, the Earth will soon have completed the 365.24219 revolutions on its axis and the 940 million kilometres of its orbit around the sun since the beginning of the year.

16 stunning pictures taken from space in 2016

Here are 16 stunning images taken in space in 2016. Grand planet Earth 2016-04-08 – The giant blue marble and the Philippines seen from the International Space Station (ISS). (Credit: NASA) Astonishing star trail view from the ISS. We kunnen makkelijk zelf iets doen tegen kledingverspilling. ATTN: - These places let you borrow stuff instead of... Zera™ Food Recycler. National Park Service Webcam. Spaceplay / pause qunload | stop ffullscreen ←→seek . seek to previous 12… 6 seek to 10%, 20% … 60%

National Park Service Webcam

This video shows the alarming reduction in the Arctic’s oldest ice. Arctic sea ice is not only shrinking, it’s also becoming younger and thinner which leaves it more vulnerable to the warming ocean and atmosphere.

This video shows the alarming reduction in the Arctic’s oldest ice

NASA calls this worrying trend a “double whammy”, and has released a new time-lapse video to show the rapid decline in the oldest Arctic sea ice over the past three decades. Every year sea ice forms in winter and melts in summer, and the ice that survives the melt season thickens with each passing year. Ice that has survived several melt seasons, known as multi-year or perennial ice, is about three to four meters thick. It is more resistant to melting and less likely to be broken up by wind and waves, which means it protects the sea ice cap during warm summers. Canada Is Forever Changed In This Stunning Google Timelapse. A lot can change in 32 years, and geography is no exception.

Canada Is Forever Changed In This Stunning Google Timelapse

Google released an updated version of their Earth Timelapse tool Tuesday, which now showcases stunning videos of the planet as it evolves from 1984 to 2016. This Is What A World Map Looks Like When Scaled According To Population Size. Where in the world did Australia go?!

This Is What A World Map Looks Like When Scaled According To Population Size

A new cartogram by Redditer TeaDranks rescales the world’s countries according to population size instead of geographic area. Reconstructing maps based on different variables can be a powerful tool for understanding the world we live in. In this case, certain regions almost disappear from the map while others expand considerably; Canada transforms into a thin, jagged line while India now takes up a massive amount of space. Other interesting tidbits: North Korea has a larger population than Australia, with 25.1 million people compared to 23.7 million, respectively. Sell your used smartphone for cash. There's A Hidden Reef Seven Times The Size Of NYC Behind The Great Barrier Reef.

The Great Barrier Reef (GBR) is one of the most remarkable natural wonders of the world, which is why it’s such a catastrophe that climate change-induced ocean warming and acidification is systematically destroying it.

There's A Hidden Reef Seven Times The Size Of NYC Behind The Great Barrier Reef

Fortunately, after 30 years of mysterious signals and unconfirmed data points, a team of researchers have revealed that there is, in fact, another. Specifically, just behind the GBR, a much deeper reef spanning an area of more than 6,000 square kilometers (2,316 square miles) has been found. That's bigger than 7.5 New York Cities. Voici à quoi ressemblent les classes à travers le monde. Chaque année le 5 octobre, l’UNESCO souligne l’importance des professeurs qui travaillent inlassablement à éduquer la planète lors de la Journée mondiale des enseignants. Voici un aperçu des classes à travers le monde dans lesquelles ils travaillent. 10 Maps That Will Change How You View The World.

This Nanotech Toilet Uses No Water And Produces Energy From Human Waste. About 2.5 billion people do not have access to sanitised toilet facilities, according to the UN. Much of this problem lies in India and Sub-Saharan Africa, where an estimated 10 million children under five have died from lack of toilets since 2000. To help address this problem from the modern world, researchers from Cranfield University in the U.K. have developed a cheap, clean, and eco-friendly nanotechnology toilet that has the ability to generate energy. Morocco Unveils A Massive Solar Power Plant In The Sahara. The Noor I Concentrated Solar Power plant, shown on Thursday, is the first phase of a large solar thermal power plant that is intended to supply more than a million Moroccans with electricity.

Fadel Senna/AFP/Getty Images hide caption toggle caption Fadel Senna/AFP/Getty Images. If you could drive a car upwards at 60mph, how long would it take to get to the Moon? More evacuation orders issued for Fort McMurray area - Edmonton. Hawaii Is At Risk Of A Mega-Tsunami. A somewhat unnerving study has suggested there is a small – but significant – chance that an earthquake and resulting tsunami could devastate Hawaii in the next 50 years. Published in the Journal of Geophysical Research, the study from the University of Hawaii at Mānoa (UHM) says there is approximately a 9 percent chance of a magnitude 9 or greater earthquake hitting the Aleutian Islands (which extend west from Alaska) in the next half a century, producing a mega-tsunami that could engulf Hawaii.

A previous report suggested that a large tsunami would put more than 200,000 residents of Hawaii at risk, and cause $40 billion worth of damage. If the scenario described above did play out, people on the Hawaiian islands would have about 4 hours to get to safe higher ground before the tsunami struck. This latest study is not based on any recent activity in the Aleutian Islands, though. The model also incorporated previous tsunamis caused by earthquakes, such as the one that hit Japan in 2011. Vast Medieval Cities Discovered Under The Rainforest In Cambodia.

Watch A Year Flash Before Your Eyes From 1 Million Miles Away. Swim Through Indonesia's Coral Reefs In This Immersive 360° Video. Australia Will Suddenly Move 1.8 Meters North On New Year's Day. We Have Already Used Up This Year's Supply Of Natural Resources.