De ingewanden van de aarde
Het absolute nulpunt en de benadering daarvan;
http://www.youtube.com/watch?v=AuaGmezXqJA&NR=1 Link
Het magnetisch veld van de aarde en andere aspecten van magnetisme Link
In-Depth Look at Ocean in Google Earth
Over the next few months, we'll be exploring each of the major new Google Earth 5.0 features. This month, we're going to explore Ocean.First, Google Earth now has 3D Ocean bathymetry. Those new blue ocean floor images are not just a 2D relief map - they are 3D terrain. First, make sure the Terrain layer is turn on. Move your mouse over the ocean and you'll see below-sea-level elevations (negative numbers). Start flying towards the ocean and tilt your view. You can now see an ocean surface, and its even possible to see waves moving on the surface.The real pleasure comes when you fly under the sea surface. You can see both the 3D sea floor terrain and also see the surface above you for a real submarine-like experience!Google also released many new ocean-related layers. Look under the Layer pane in the lower left for a new "Ocean" layer folder. The folder contains a number of interesting new layers including material from National Geographic, Cousteau Society, BBC, NOAA, and more. There are locations of shipwrecks, tracks for ocean expeditions, GPS tracks of sea animals, and lots of information about the ocean environment. Read more.
The Ocean layers provide plenty of interesting material to read and watch, but how about some 3D? The Google SketchUp team built a series of 3D models to add more to the Ocean. A sample of the 3D ocean objects can be seen by downloading this KML file
(Be sure to turn on the 3D Buildings layer). The file is a simple placemark tour of the models placed around the oceans. They can also be viewed in the 3D Warehouse in the Google Earth - Ocean Layer collection. There are a few outstanding 3D models to be found in this collection such as the R.M.S. Titanic, German Battleship Bismarck and Aquarius Underwater Laboratory. Additional features such as other submarines, shipwrecks, and dive destinations can be found. Also of interest is the presence of ocean creatures such as whales and squid. The new Ocean features of Google Earth 5.0 are fun to explore, and educational as well.