The Earth How do we get two high tides at 12 hours apart from each other? What is the present location of the magnetic North Pole? I've become convinced that the Earth is gaining circumference at the Equator. Can you tell me if this is true? Which organizaiton is actually capable of accurately measuring the diameter and how do they perform this? Why is the Earth a sphere? Has anyone ever drilled to the center of the Earth? What is the difference between the North Geomagnetic Pole in Greenland and the North Magnetic Pole on one of the Queen Elizabeth Islands? How hot is the centre of the earth? What is the size of the earth? Why is the center of the earth hot and full of lava? Why is the earth's center hot and full of lava? (a second answer) Why is the temperature hot at the equator and colder as you move toward the poles? How does the Earth's core generate heat energy? Where is the magnetic north pole in January 1997? What do earthquakes, volcanoes, and other activities on the Earth's surface tell us about changes on Earth? What is the most current view (theory) on the cause of polarity change in Earth's magnetic field? How deep would you have to dig to reach molten rock inside the earth? What is a good source for information on the deviation of magnetic north from true north for a given location (US)? I am a teacher looking for a map that would include in general terms the values of g ( strength of the earth's gravitational field ) for areas across Canada or if required the USA. Can you help me? What would happen if you could fall through the centre of the Earth to the other side? How do you determine the structure of ocean basement? What would be the current theory as to the structure of the earth, the temperature of each layer and thickness of each layer? What methods are used to help determine this? What are the different layers of the earth?

Last Modified: 2004-12-10