background preloader

Tectonic Plates

Tectonic Plates
The edges of these plates, where they move against each other, are sites of intense geologic activity, such as earthquakes, volcanoes, and mountain building. Plate tectonics is a relatively new theory and it wasn't until the 1960's that Geologists, with the help of ocean surveys, began to understand what goes on beneath our feet. Where is the Evidence for Plate Tectonics? It is hard to imagine that these great big solid slabs of rock could wander around the globe. Scientists needed a clue as to how the continents drifted. The discovery of the chain of mountains that lie under the oceans was the clue that they were waiting for. Click here for the Scotland story Picture the following in your mind: You have a nine piece jigsaw (now there's a challenge). What do you think will happen to the puzzle? Now let's think back to our plates being created at the mid-ocean ridges, it seems to be a good idea but if this is the only type of plate movement then the world would get bigger and bigger.

http://www.moorlandschool.co.uk/earth/tectonic.htm

Related:  lycée0004 Understand the components and evolution of the Earth system

Plate Tectonics Quicktime versionAVI version Animated gifs Last 750 million years: [1.04 MB] [506 KB] [261 KB] Last 750 million years in reverse: [1.04 MB] [506 KB] From 750 mya to the beginning of the Paleozoic: [294 KB] [166 KB] Plate Tectonics Ask GeoMan... What is plate tectonics? There are really only two processes: one that forms the physical earth, and another that beats up the surface and tears it apart through weathering and erosion. The formational process is called tectonics, and is manifested to those of us living on earth by earthquakes, volcanos, and mountain building in general. The earth is really just a sphere of liquid rock (magma) which has cooled to the solid state where exposed to the coldness of space.

Solar-powered sea slug harnesses stolen plant genes - life - 24 November 2008 Video: Watch a sea slug eat algae to nab some of its chloroplasts, and the genes that keep them functioning It's the ultimate form of solar power: eat a plant, become photosynthetic. Now researchers have found how one animal does just that. 3. Journey Through Earth In the style of Jules Verne’s book Journey to the Center of the Earth, take your students on a walk, using sidewalk chalk to mark the boundaries between the different ... SummaryIn the style of Jules Verne’s book Journey to the Center of the Earth, take your students on a walk, using sidewalk chalk to mark the boundaries between the different layers inside our planet. After you pass through each layer, tell your students about the layer of the Earth they just traveled through. This lesson was developed by Eric Muller of the Exploratorium Teachers’ Institute. Here you will find a student handout for taking notes during the walk, a teacher cheat sheet and some assessment ideas.

Rwanda’s rainforest renewal : National Parks, Africa When choosing Rwanda as a holiday destination, many people are keen to see the country’s rare primates and learn about its dark past. But those who work in the tourism industry are keen to show visitors a new Rwanda. Not one that is dismissive of its history – but one that offers more than museums and gorillas. Related article: Experiences that make time stand still For the last seven years, the Rwanda Development Board (RDB) has been focusing on the rainforest 200km to the west of capital city Kigali in a bid to attract adventurous travellers. Created as a national park in 2004, Nyungwe is full of waterfall treks, colobus monkey spotting and canopy walkways – and thanks to the recently improved road infrastructure from Kigali – is easily accessible.

3 types of volcano structures Scientists describe 10 types of volcanoes but 3 types of volcano structures are most often discussed. The 3 main types of volcano structures are listed below with brief descriptions. 3 types of volcano structures Blue Carbon - The Role of Healthy Oceans in Binding Carbon Global Ocean Acidification As carbon concentrations in the atmosphere increase, so do concentrations in the ocean, with resultant acidification as a natural chemical process. 06 Oct 2009 - by Riccardo Pravettoni, UNEP/GRID-Arendal Larimichthys polyactis Catch in early 2000s and predicted Catch Shift

rift valley A rift valley forms where the Earth’s crust, or outermost layer, is spreading or splitting apart. This kind of valley is often narrow, with steep sides and a flat floor. Rift valleys are also called grabens, which means “ditch” in German. While there is no official distinction between a graben and a rift valley, a graben usually describes a small rift valley.

Geology Cafe.com Behavior of the Lithosphere: (Crust and Upper Mantle) Subdivisions used in geologic discussions relating to "Plate Tectonics Theory" (discussed below) include: lithosphere—the rocky outer portion of the Earth, consist of the crust and upper mantle (about the upper 60 miles below the Earth's surface). It is the solid "brittle" zone of the earth where earthquakes occur. asthenosphere—the upper portion of the mantle underlying the lithosphere where heat and pressure is great enough for materials to flow "like plastic."

Related: