About the weather:

English sites:
- http://www.weather.com/learn_more/

About gravity:

Dutch sites:
- http://gallery.uunet.be/nicvroom/index_nl.htm

English sites:
- http://gallery.uunet.be/nicvroom/index_en.htm
- http://spaceprojects.arc.nasa.gov/Space_Projects/SSBRP/gravity.html

About earthquakes and seismology:

Dutch sites:
- http://www.geo.uu.nl/~devilee/seismo/index.html
- http://www.geofoon.nl/Seismologie.html

English sites:
- http://www.scecdc.scec.org/glossary.html
- http://www.seismo.berkeley.edu/seismo/faq/faq.html
- http://www.seismo-watch.com/EQSERVICES/SeismoFeatures/Features.html
- http://www.seismo.unr.edu/ftp/pub/louie/class/100/100-earthquakes.html
- http://wwwneic.cr.usgs.gov/neis/general/handouts/glossary.html
- http://www.weather.com/safeside/earth/index.html

Effects of Earthquakes:

English sites:
- http://peer.berkeley.edu/research/

Earth fact sheet:

English sites:
- http://nssdc.gsfc.nasa.gov/planetary/factsheet/earthfact.html

Continental drift animations:

English sites:
- http://www.ucmp.berkeley.edu/geology/tectonics.html

History of the Earth:

English sites:
- http://www.ucmp.berkeley.edu/exhibit/geology.html

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