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How Landslides Work" See more pictures of natural disasters. When it comes to natural disasters, the tornadoes and tsunamis of the world tend to get all of the attention. Rarely do landslides seize as many headlines as the volcanoes and earthquakes that can cause them. But when the ground literally rips downhill, the effect is often more damaging than the trigger. The force of landslides can cave houses, dam rivers and annihilate entire towns. What causes tornadoes? Americans know tornadoes like no one else. The U.S. averages at least 10 times more twisters each year than any other country on Earth, and their intensity is infamous — the worst can be a mile wide, rotate at 300 mph and plow along at 70 mph. Yet despite being target practice for these atmospheric power drills, America's tornado mythos is still cloaked in mystery and misunderstanding. That's understandable, considering tornadoes' stealthy nature — sudden appearances, erratic behavior and brief lifespans make them elusive subjects to study — but science has nonetheless learned a lot in recent decades. Tornadoes can occur any time of year, but they wage all-out war on the U.S. during spring and summer. With another tornado season already ramping up, below is a guide to how tornadoes work, when and where to expect them, and what you can do to make it out alive.
Rock Cycles cycles Rock Cycles Even rocks have a cycle. Rocks are continually circulating in the mantle just below the crust of the earth. They are sometimes thrust up into the crust due to convection currents. Seismic Waves" This content is not compatible on this device. Click the play button to start the earthquake. When P and S waves reach the earth's surface, they form L waves. The most intense L waves radiate out from the epicenter. When you toss a pebble into a pond, it creates radiating waves in the water. When Exploding Whales Goes Horribly Wrong Yesterday we brought you the story of a blue whale that washed up on the shore of a small town in Canada. The people in the town don’t have the resources to deal with the carcass properly, but aren’t getting any help from the federal government. Dead whales become grossly inflated from gas buildup as they decompose, so the clock is ticking as the people of Trout River decide what to do. Luckily, they have a perfect example of what NOT to do thanks to the town of Florence, Oregon who were faced with a similar situation in 1970.
Top 108 Earthquake and Tsunami Sites By Lorri Cardwell-Casey The good news: the scientific community’s succeeded in giving the public plenty of earthquake and tsunami information. The bad news: sometimes, there’s so much information out there, it can feel like a tsunami of data. We’ve done the hard work for you. We’ve searched and sorted through earthquake and tsunami websites, in order to present one easy-to-navigate site with the top 108 sites and resources in this annotated list of over 150+ resources.
Water on, in, and above the Earth - USGS Water Science for Schools The USGS Water Science School A Beta version of the new USGS website has been released for public comment.Use the "Feedback" button at bottom of every Beta page to tell us what you think. As the saying goes ... wwf - Footprint calculator | The ecological footprint calculator is not mobile or tablet compatible. Read more about how you can change the way you live to reduce your footprint. | Australia's ecological footprint Australia has one of the world's largest ecological footprints per capita, requiring 6.25 global hectares per person.
EarthScienceAnimations Animation: Earth's Atmosphere Lesson 19: Atmospheric Structure contains instruction on the troposphere, the tropopause, the jet stream, the stratosphere, ozone, the production of ozone, the destruction of ozone, chlorofluorocarbons, the stratopause, the mesosphere, the thermosphere, the ionosphere, the exosphere, and the Earth's atmosphere. To begin the animation, click here. What is a glacier? Donjek Glacier in the Saint Elias Range, Yukon Territory, Canada. 1985. —Credit: Natural Resources Canada. Photograph by Douglas Hodgson. Copyright Terrain Sciences Division, Geological Survey of Canada. Mummified Monk Found In Lotus Position The mummified body of a Mongolian monk has been found in the lotus position, looking as though he's been meditating for the last 200 years. Very little information has been released about the find. Mongolia's Morning News reported: “Experts that only had time to carry [out] a basic visual test say they believe the body can be about 200 years old.
Plate Tectonics ~ Plate Tectonics Theory ~ What Alfred Wegener didn't know... Plate Tectonics: Why do continents drift? Answer: Crustal Plates move due to Sea-Floor Spreading, and because of Convection Currents in the mantle. Advances in SONAR or SUBMARINE technology in the 1960's