Earth Science Picture of the Day. 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 allowed scientists to understand what was happenig on the Ocean Floor. ~ Sea Floor Spreading ~ Click here: Harry Hammond Hess // SFS with Bill Nye Animation Above: How sonar works. Sound waves bounce off the ocean floor, and then back to the sonar recording device on the ship. Ocean Floor Map Question: Why is the Sea Floor spreading? Answer: Convection Currents in the Mantle are causing Oceanic Crust to separate.
Above: Boy from Iceland Above: The Mid-Atlantic Ridge Above: The Global Mid-Oceanic Ridge System The Sea Floor is Diverging (spreading apart) at the Mid-Ocean Ridges: A Mid-Ocean Ridge System Click here: Labeling Sea Floor Spreading at Mid Ocean Ridges - Interactive Below: Subduction Zone Here's the deal... A. B. C. Pre-Plate Tectonics...
Japan Quake Map. Geological Features of Yellowstone. Map of The World - Shaded Relief. Virtual Volcano : Pompeii. 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. Imagine really thick jam slowly cooking in a big pot on a stove. Once on the surface of the earth, rocks cool down. Sample some of the following activities to learn more about rocks and their cycles. Places To Go People To See Things To Do Teacher Resources Bibliography Places To Go The following are places to go (some real and some virtual) to find out about rocks and their cycles. Ayers RockVisit famous Ayers Rock in Australia.
Devils Tower National MonumentVisit Devil's Tower in Wyoming. Easter IslandStroll along the beaches of Easter Island. The Formation of the HimalayasVisit the Himalayas. The Geology of the Grand CanyonErosion is part of the cycle of how rocks erode from wind, water, glaciers, and shifts in temperature. Grand Canyon ExplorerVirtually visit the Grand Canyon. How Do Soils Form? 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. You will need to download Macromedia Flash Player to view this lesson. Earth Science Week. Top 108 Earthquake and Tsunami Sites | Wisdom, the Midway Albatross. 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. We can save you time. These are serious subjects. Table of Contents: Earthquakes What is an Earthquake? Table of Contents: Tsunamis What is a Tsunami? *Indicates a website used for two or more listings throughout our site excellent article and its illustrations gives quick answers to kids’ common questions about an earthquake.
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